During the clown fight in the alley, the glass with the presidential seal is concealed within a black pouch attached to Nick's pants on his left side. After the fight, it is attached to his right side.
A rope ladder is lowered from a helicopter. Judging by the length of the ladder, the helicopter is hovering only a couple of dozen feet overhead, yet there is no downdraft apparent on the people under it. No one's hair is even disturbed.