What happens between Armpit and some police officers and why?

A security guard asks to see Armpit's tickets. As Armpit searches his many pockets, the guard asks him to leave so the people who claim Armpit is sitting in their seats can sit. When Armpit, still looking for his tickets, refuses, the guard calls over a pair of police officers. Armpit finds the ticket stubs. The security guard looks at them and announces they're forged, Armpit reaches for them, and the police officers grab him and force him to the floor. Meanwhile, Ginny has a seizure, which the police believe is a reaction to drugs they think Armpit has given her. Armpit tries to get to his feet to help, but he is knocked to the ground. The Mayor appears and intervenes. Armpit appeals to her memory of his working for her. She orders the police officers to let him go, which they do. Armpit hurries to Ginny to comfort her.