Plot hole: When Richards' turbo sled goes through the tunnel along with Weiss' and Laughlin's, the video monitors show all three sleds are traveling through the same tunnel. Richards' sled comes out of the tunnel first, but with the speed the sleds were going and all three in the same tunnel, there wouldn't have been enough time for Richards to be pulled out, and Laughlin would have come out so fast it would have crashed into Richards, ending his running before it even started.
Plot hole: When Richards and his buddies are making their escape from the prison at the beginning, Weiss can't get the code to work to shut down the deadline. He says it must be because of the walls, but why all of a sudden would that be a problem? All he did was move a few feet from where the security guard was sitting, so the walls shouldn't have made a difference that quickly.