During the escape at the beginning of the movie, the three escapees all are 'blown' by the explosions at different times, including Jesse and the female being thrown before the explosion occurs.
When Jesse flips the white bad guy who breaks his neck on the weights, his is flipped in a manner that would not have him land the way he lands. Also, his eyes are blinking after he is dead.
After Gamma shoots herself through the head the camera cuts to Jesse taking her ear-pod. When he does so, her head is completely intact and no there is no sign of a gunshot wound.
When the 'Phoenix Falcons' basketball team tips off, the time clock is set for eighteen minutes, rather than fifteen. Also, after fifteen minutes of playing time, 53 points (28-25 for the home team) have been scored, which is extremely unrealistic.
When the black bad bad guy is chasing Jesse's daughter around the arena during basketball game, no spectators a can be seen anywhere. This is completely unrealistic.
Late in the movie Jesse fires the t-shirt gun and takes out the woman with the first shot, ,the second shot misses the male terrorist and explodes in a wet mass against the wall behind him.
The sign after the fight with Gamma says Rennovation, Correct spelling is Renovation.
Early in, Jesse's boss asks him to get his kids 'situated' because all guards will be needed to be ready for first patrol. In a stadium, most guards would not be patrol guards, but rather static (stationary). They would be needed for first shift, if anything, not first patrol.