Danny Ainge is more than a shrewd negotiator with a penchant for landing monumental offseason trades. It seems that he's also a comedian. After Celtics guard, Terry Rozier tweeted about Friday the 13th, Ainge replied with the simple directive to “Get to bed.” He even threw in an emoji for good measure.

That's what the kids are doing these days.

This may not be the first time that Ainge has scared Rozier this offseason. With the Celtics future plans up in the air, Rozier could prove to be a dispensable player. It's possible that Ainge may look to deal Rozier after his eye-opening playoff performance that has caused Rozier's stock to rise considerably.

But at least for one night, Rozier's nightmares won't be about being involved in a possible trade. On Friday the 13th, his nightmares were more likely about the slasher, Jason, who dons a retro hockey mask.

But then again, Rozier may not be having any nightmares at all. Rozier was granted the nickname “Scary Terry” and soon shirts with an image of Rozier donning the classic hockey mask from Friday the 13th were seen all throughout the Boston Garden.

The name Scary Terry originated on the TV show Rick and Morty. Celtics fans quickly started referring to Rozier as Scary Terry and his playoff performance lived up to the moniker.

So while Ainge may have been jokingly trying to give Rozier a scare, it's clear that Scary Terry is the one who does the scaring.