The NRL is considering considering limiting the use of freeze-frame and introducing a captains challenge in a shake-up of the controversial bunker.Amid a swell of anger over the $2 million video review system, NRL chief executive Todd Greenberg has promised an end-of-season review to look at a raft of potential overhauls.Video referee Bernard Suttons decision to overturn a try to Brisbane forward Herman Eseese in their round-21 loss to the Sydney Roosters on the grounds of a double movement proved the flash point for a fresh round of criticism levelled at officials.Eseese appeared to roll over the line, with the momentum of defenders Blake Ferguson and Dylan Napa, however the bunker poured over the movement in slow motion and concluded he had made a second effort.The use of freeze-frame technology was slammed with many fans and commentators arguing it appeared to be a legal try when viewed at regular speed.Greenberg, while supporting the bunker and the manner in which it had sped up the game, said the NRL was examining whether freeze-frame should be allowed to be used when ruling on incidents such as double movements.Theres a real challenge. Our forefathers who wrote the rule book back in 1908 almost certainly never considered freeze-frame technology, Greenberg told Triple M on Saturday.Theres no doubt our sport and other sports are having a real challenge in how we implement best practice technology into the modern-day game while using a rule book that was written without the concept of technology.What that means in a roundabout sort of way is that - should we adjudicate on all the issues that were adjudicating on in the game? Or are things like double movements and other things not the right things to look at because its so hard to interpret a rule book with the use of technology?Greenberg said he was also looking at introducing the captains challenge that had been used in the under-20s competition since 2012.Allowing players to challenge contentious decisions has been used in cricket and tennis and Greenberg has flagged it as a possible way to quell unrest over video review decisions.Whether you put the onus back onto the players, thats a decision that were going to look at over the course of the off-season and making sure that you take some of that controversy away, Greenberg said.The one thing that the technology has provided, and will continue to provide in all sports, is to take away the howler, to take away the one that is missed that everybody gets upset about.No doubt it does that but then youve got to be careful youre not micro-managing the game. Shoes NZ For Sale . 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F1 photographer Mark Sutton walks ESPN through his favourite shots from Austria and Great Britain.Ferraris season in a shotCamera model: NIKON D5 | Exposure time: 1/1600s | Aperture: F5.6 | ISO speed: 400 | Lens: 500mm telephotoThis was just a bizarre one. I was walking behind the photo tower and there was a huge bang, I thought what the hell was that thinking a car had hit a barrier. By the time I got around there the car was just sat in the middle of the track so I poked my camera through the fence. There was a nice sequence of him climbing out of the car. He wanted to run across the main straights to the pits but they wouldnt let him. This is my favourite shot of the sequence because youve got the Mercedes in the distance and this picture probably sums up Ferraris season so far -- lots of little issues and wasted opportunities while Mercedes have stayed out in front.Procar raceCamera model: NIKON D5 | Exposure time: 1/1000s | Aperture: F13 | ISO speed: 1000 | Lens: 70-200mm zoom with 1.4 converterPeople love these Procar races, it was amazing seeing the reaction on social media to this race. This is something they used to do on a regular basis, putting drivers into one car for special races which formed its own championship. In Austria a bunch of the old guys went out, including Niki Lauda, on what was a bit more of a parade than a race. It was great to hear the roar of the engines, the pure power of a normally-aspirated engine.It was a pretty good spectacle. Marc Surer went off on the first lap and then we saw him in the paddock trying to hide his face from everyone, he looked quite embarrassed. It was great to see some of the old timers there, they certainly enjoyed themselves being back in them. Id love to see them doing something like this for modern F1 drivers because the fans enjoy it, its a bit different.Awkward HaloCamera model: NIKON D5 Z| Exposure time: 1/400s | Aperture: F4.5 | ISO speed: 1600 | Lens: 70-200mm zoomThis was before Sebastian Vettel and Ferrari tested the Halo device at Silverstone. I think I captured this moment quite well. We obviously got the standard pictures of him going in and out of the garage with the Halo on but this a shot of him actually squeezing in and out of the car.dddddddddddd This shows how awkward it is to get out, one of the main concerns about the device. Halo pretty much is the size of the cockpit but theres another barrier to overcome for the driver or for a marshal extracting him from the car. One he had got out his foot nearly got caught on it as well, highlighting further reasons it perhaps needs revaluating before a decision is made.Safety Car startCamera model: NIKON D5 | Exposure time: 1/1000s | Aperture: F9 | ISO speed: 200 | Lens: 70-200mm zoomIt was pretty surreal being on the grid when this sudden downpour occurred. Everyone was scrambling around for new tyres, trying to not get their cockpits wet, finding umbrellas for their VIPs, it was a bit ridiculous! It was a shame -- and controversial -- they started under the Safety Car but these two shots show just how bad the spray was for those further back in the pack.The first few laps were pretty chaotic because people changed immediately for intermediates, knowing it was already drying quite quickly. The only thing annoying about this picture is that you can see what looks like an empty grandstand in the background -- it does not give a fair reflection of the Silverstone crowd at all. You can see the packed grandstand to the left, the one opposite the pit lane.CelebrationsCamera model: NIKON D5 | Exposure time: 1/1000s | Aperture: F6.3 | ISO speed: 250 | Lens: 500mm telephotoIt was great seeing Lewis Hamiltons celebrations at Silverstone. He genuinely went beyond what is expected of most drivers when they win a race, engaging with the fans and generally looking like he was having the time of his life. The champagne shots like this are always good fun as the drivers put aside any differences of frustrations and enjoy themselves on the podium for a brief moment. With the pendulum swinging between Hamilton and Nico Rosberg its important to get as many different shots of the pair as possible. ' ' '