Justin Carter, a Texas teenager, was arrested over a sarcastic Facebook comment and is now on suicide watch, according to multiple news outlets.
Carter, 19, was taken into custody in February after an argument he had on the social network regarding the online video game League of Legends.
"[S]omeone had said something to the effect of 'Oh you're insane, you're crazy, you're messed up in the head,’" his father Jack recalled to an ABC.
"To which [Justin] replied 'Oh yeah, I'm real messed up in the head, I'm going to go shoot up a school full of kids and eat their still, beating hearts.'"
The next two lines were "lol" and "jk" - but not everyone found it funny.