In the second Hulk out, the Hulk's pants change color from blue to brown between takes.
After Banner Hulks out when he crashes into the building, he emerges wearing blue pants instead of a tattered skydiving suit.
When David is given the reserve shoot he clips it on to his chest but the shoot that opens is on his back.
After the Hulk comes out of the shed after crash landing and starts running you can see he is wearing some kind of slippers.