That is what some tourists in Las Vegas were wondering when they suddenly felt drops of water falling down from the sky.
What was it? According to officials, it was a teen urinating on visitors from the slot machine-inspired zip line ride at the city's Fremont Street Experience.
The disgusting stunt had the teen's parents apologizing over and over again once they got off the "Slot-Zilla."
A visitor from Hawaii says he thought it could be water, maybe a beer, but never in a million years would he imagine he would be urinated on in Las Vegas.
VIDEO: Man arrested after squirting people with a liquid believed to be urine
Gross: Chlorine in a pool doesn't make your eyes red...it's the urine