Brace yourselves, everyone. You're about to see something super gross.

A leg cramp is one of the most painful things a human body can experience. And the worst part is, there's not much you can do about it -- you kind of just have to let it pass, while not accidentally making it worse.

Facbeook user Angel Bermudezposted a video of him experiencing a leg cramp so violent and disgusting that it looks like a baby alien is living in his leg. It's hard to watch, but also hard to look away from.

OMG, ow ow ow ow.

"After the workout. Start to relax and then this happens. Fucken cramp. Look at this shit. Painful yes it was," he captioned the video.

Is it just us or can you physically feel his pain through this video?

Let this be a lesson: stretch after workouts, drink tons of water, eat lots of potassium, and don't let alien lifeforms take over your body.