This hasn't happened in awhile, but I did recently throw up for reasons unrelated to natural sickness or drinking too much.

My gout was acting up and my mom had a leftover pain pill from when she injured her hip from a fall. What she failed to tell me is that the pill is prone to making people sick. The damn thing didn't even work, so all that happened was I felt queasy and puked a few times at once. Thankfully I felt better after that one round.