We get it. Pranks are funny and all. But they're only appropriate when it's harmless and everyone gets a good laugh. And as a general rule of thumb, it's always a bad idea to mess with the people that handle your food, because, well, THEY HANDLE YOUR FOOD!
The guy in this video thought it would be cool to honk his horn just as the McDonald's drive-thru employee was handing him his drink. He did so, which obviously startled the employee. Instead of just being annoyed and dealing with it, the employee enacted some vigilante justice, tossing the massive drink at the driver and slamming the window in his face!
This prank couldn't have backfired more perfectly!