KAFUE NATIONAL PARK, Zambia-- A tour boat had to floor it when it was being chased.
The video was shot on a lake in Zambia.
You see something in the water get closer and closer.
It's not a shark, or a crocodile - it's a hippo.
A giant hippo popped out of the water.
It's possible that it could have destroyed that boat if it wasn't going so fast.
A hippo's jaws are so strong that it could have bitten right through it.
Some say it's the most dangerous animal in Africa, killing nearly 3,000 people a year.