Here's an interesting piece of video of a couple of deer in a park.
A video camera captured what happens when deer get mad, and they don't have any antlers with which to fight.
Instead, they stand up on their hind legs and start beating each other with their hooves.
Wildlife biologists say bouts like this one don't last long and there are rarely any injuries.
Unfortunately, for the deer on the right of the screen, he crashed into some nearby bleachers.