Revealing mistake: At the start, just as Moreau rides up the stone road leading to the monastery up ahead, before he passes the two guards we can see that it's a flipped shot - note the backwards license plate number.
Revealing mistake: When the guy is thrown off his bike at the start, it is a very clear CGI person that shoots. (00:04:15)
Suggested correction: It's extremely clear that it's a real guy in all of the shots, real actor from the front, and stuntman from the rear point of view.