Plot hole: When Cage is hiding the VX gas balls at the end by putting them in a drain you can see he is holding the loose ball, but then in an instant cut picks it up along with the chip.
Plot hole: When Mason and Goodspeed are locked in the cells together Goodspeed asks Mason what he did to pass the time when locked in the cells on Alcatraz. Mason mentions he dreamt of meeting his daughter one day. However it has previously been stated that Mason was in the rock 1962-63 but his daughter wasn't born until the 1970s.
