Dude in the orange attempted to rob them with mace. As he walks up you can see him grab something out of his pocket then put it in dudes face. Later you can see him spraying it at dude but he's standing too far away.

Cheap/spent mace for sure.

Proposing to orange dude's girlfriend?

Looks like dude in the orange saw dude proposing and often times proposals come with a fancy expensive ring. Clearly an easy mark. As the orange guy walks up, you can see him pull mace out of his pocket which he then sprays in dudes face at a close range. However, instead of being incapacitated, proposal dude clearly has a strong paradoxical reaction to the mace and becomes the pure embodiment of rage in physical form. This proves to be problematic to the man in orange.