In keeping with the movie's motif, it was an old truck that probably
should have stopped working in 1993.
The vehicle was then "impaled" on something in the water, leading the crew to believe that they had just witnessed a death. However, as Sylvester Stallone calmly filmed the entire event with his cellphone (presumably considering what he was going to do with the 1/17th of the royalties his co-star would never get to spend), Statham was able to quickly extricate himself from the vehicle. And thanks to his professional-level diving ability, he was also able to make his way to the surface and survived a calamity that Stallone admitted would have killed a normal, non adamantium-boned man.
Forty-five seconds later the resulting abrasions coagulated into a tattoo
of a fiery demon making finger guns.
Reports claim that Statham's drop into the treacherous drink was 60 feet, which doesn't really seem to be the case when looking at the footage -- but let's not quibble over details. Let's just go ahead and rely on the testimony of another physically superior, not-to-be-trifled-with human brick who was also present that day, and simply take Terry Crews at his word when he says: "Let me tell you something: Jason Statham is a true bad, bad dude."