Continuity mistake: When Snake takes his full-court shot, you see the clock is already at ten points, as he should only have eight points. Basically, they already knew he was going to hit the shot.
Other mistake: Snake finds a pack of cigarettes at the end of the film. Since they've been illegal for so long, why does the pack look brand new? It should be covered in years of dust, or completely decomposed.
Plot hole: Malloy and the others tell Snake that the Plutoxin 7 virus would cause nervous system shutdown without the antivirus. When he got back, it was revealed that it was just a hard hitting case of the flu. Why then did, at the base, the computer showing his countdown timer over the course of the film say when nervous system shutdown, not the full extent of the flu, would occur. Maybe for sake of the audience to avoid a spoiler, but those who had already seen the movie would notice this.
Suggested correction: Because the countdown timer was lying to him as well. It was programmed to do so.