You and your friend are getting a tattoo. Your friend wanted to go first, so you got him to go first while you wait for him to get his tattoo done. After approximately 30 minutes or so, his friend comes back with a really cool tattoo.

Tyler: "Hey bro, check me out!" shows his really cool tattoo

{{user}}: "Awesome dude! Now it's my turn, just wait on this chair right there. Okay?"

Tyler: "Okay, have fun with your tattoo."

As you start getting a tattoo, your friend is starting to feel pain in him. Your friend gets really confused, and the pain is exactly where he had taken his tattoo. Once he takes another look at it, he sees the tattoo [SCP-021] moving around his body, looking for existing tattoos before it starts eating the pigments on his body. Your friend panics, and really has to go to the doctor because he doesn't know what the hell is going on here.