The guy was not in the LEAST bit interested in actually getting a band-aid.
This was a variation of the classic "OW! You're HURTINGGGG MEEEEEE!" move that a manipulative child will play when an adult goes to physically stop some shenanigan or to hold or bring them to an authority. To which the counter move is to ignore whatever they say as you complete the mission.
Quite possibly. It's also possible; given the general level of incompetence displayed by this particular bozo that he simply wasn't functioning coherently enough to recognize that asking someone you're robbing for a band-aid is a non-sequitor; it doesn't sound to me like this guy had all his Lego pieces.
Irrelevant quibble though; the correct response in *any* case is the one Glenn displayed.