my guess is that on part 2 the old dude came back for his bag. He starts beating on a newspaper kiosk or something like that right in front of the camera. seems like maybe one of the girls antagonized him right before that... probably said they were gonna sue him or that they had his bag. Old dude can't just beat up more people on the street to get his bag back, so he goes semi-ape shit. Feel bad for him. Looks like he blew a fuse, kicked some ass, and lost his bag. I'm not thinking he's too happy with the outcome. was just defending himself and still lost his bag. probably running on pure adrenaline in that 2nd clip.