First thing I thought of viewing the pictures was the mixing bowl scenario, then I scrolled down to see pictures of one...lol.
It's a common prank which I suggested (and others) to be the nature of the "Greek Goats" photo.
When saying "It was up in the air for 8 mins", ...how do you know? Just based on the testimony of drunks?
The photos could all be independant shots of several "bowl tosses".
Looks to me like the guy in the foreground of a couple of the shots could be the "bowl tosser".
Also, the hood of the car being open being an indication that the car may have been broken down for a while and the occupants got bored?
Why a bowl in the car? Maybe they brought food to the wedding and were bringing their bowls home?
This one looks a bit hoax-like to me.
I think you may have nailed it Synch.