Technically it was the Lamborghini passenger who did the haymaker-ing. And technically it was the Lamborghini that deserved a punch.
But seriously, don't jump on a Lamborghini. Also, don't bike in front of a Lamborghini. And also, don't yell at a Lamborghini.
I'm not taking sides here, as I realize the annual summer long London supercar invasion can get tiring for residents. On the other hand, lots of people seem to enjoy the spectacle. And hey, it's a free world... to some extent.
Credit
London Lamborghini Driver Punches Pedestrian.