I will be the first to admit that I have done some really stupid things in my day, but I've never done something this stupid.
A man snuck into the hippo enclosure and smacked it on its butt. He then quickly jumped out as you can see in the video.
This is pretty dangerous as hippos are known for being deadly. According to Wikipedia:
The hippopotamus is among the most dangerous animals in the world as it is highly aggressive and unpredictable.
Police are currently looking for this guy, thought maybe they should just toss him back into the hippo enclosure and let the animals pass judgement on him.