Yep, hours of tedious masking. The most impressive shots are the ones where the camera moves, such as the two shots from 1:59, awesome! I think they may have used a dolly in the second one with a motor to move it at a constant speed and matched it up that way. As for the jump, they've clearly used the one shot but duplicated it a bunch of times, offset them before and after the original shot in time and used some pretty clever (although not perfect, watch the guys in the lead at the end of the shot) motion tracking to get them to all line up and move properly with the camera.