Dave Grohl, As Dave Letterman, Interviews Alice Cooper On 'Jimmy Kimmel Live!'

Ron Dicker

Foo Fighters frontman Dave Grohl experienced the best Halloween treat while guest-hosting on “Jimmy Kimmel Live!” Tuesday.

“I can’t believe I get to dress up like David Letterman and interview Alice Cooper,” Grohl declared.

We can’t believe it either.

But there they were, with Grohl disguised as Letterman in his Santa-like beard, and Cooper stained with fake blood for the ghoulish holiday.

The two discussed pre-concert rituals, which really served as an excuse for Cooper to throw knives at a photo of Matt Damon. Good to know that Kimmel’s comical feud with the actor could carry on without him.

Cooper then related a spooky anecdote about the time he and Aerosmith guitarist Joe Perry were coming off rehab stints and they stayed together in a New York house to write a song. But loud noises in the basement and other unexplained events cut their plans short.

Said Cooper: “It’s not like the movies where you go, ‘Let’s get a flashlight and go down and see what it is.’ No, we were out the door.”

Hear the scary details above.

  • This article originally appeared on HuffPost.