A camera overlooking a water hole in Africa captured some incredible footage.
Blue wildebeest are known for being incredibly tough animals.
Watch the video below (you can fast-forward to about the 40-second mark) to see what I mean.
Lesson learned: be careful when walking up behind a zebra! Taking a hit to the head like that will incapacitate or possibly kill even the biggest and toughest animals.
It looks like that blue wildebeest was going walk away with no more than a really bad headache. Maybe that'll teach it to be a little more careful next time.