The logic of Wayne
Generally speaking, Wayne taunts people to grab attention, when he fears their attention will veer away from him. Regardless of how much their attention is required elsewhere. He prefers being the sickest man in the room, and if someone else is sick or had an accident, trust Wayne to act up! And besides that, he's miffed that his expensive liqueur was confiscated by Colson so he's getting his own back.