Evan van der Spuy rides along minding his own business for Team Jeep South Africa during a mountain bike race through Albert Falls Dam in South Africa. Then, along comes a red hartebeest, a large antelope that can weighs between 265 to 440 pounds, that rams right into him.

Watch the footage, which provides an excellent reason to wear a helmet. (Note: at 4 seconds in, fellow ride shouts “Watch the buck”):

Fox reports van der Spuy suffered a minor concussion.

[h/t Buzzfeed]

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