Everyone is a fan of something, whether it's movies, music or games. And while it's fun to dive into your love of movies or gaming, there are some fans who take things a bit too far.

Like teenage online gamers.

This hilarious mashup video is about how Call of Duty fans are the greatest fans in the world. But it also pulls back the curtain to reveal what they're really great at -- temper tantrums. Warning, there is strong language in this video, so cover your kid's ears. Unless this is your kid in the video, then maybe you should ground him.