Hahahaha i did this at someone's house once lol. I got invited to his leaving do, he was going away to America.
Anyway we had a massive barbecue and there was all kinds of food, so i just proceed to stuff my face with as much as i can. His aunt brings out a plate of this salad stuff that ended up being spicy but i ate it regardless. I start feeling sick so i run up to the bathroom. I start throwing up in the sink (i don't like throwing up in toilets, sticking my head near one just makes me feel sick)
Anyway the vomit is quite thick and i struggle to get it all out. His nan knocks on the door and asks if i'm OK and i say yes, It turns out that the bathroom sink was connected to the kitchen sink downstairs and she must've been washing up the dishes when she saw my vomit coming up from the sink.
The drains ended up being blocked and at the side of the house, all the gunk from the drains was just coming up to the surface. They called a drainage company and a guy came with a van and unblocked it all.
It was funny although at the time i was panicking a lot ROFL.