Last week, Conan O’Brien stopped by The Late Show with Stephen Colbert and told the story of how David Letterman sent a horse to Conan’s soundstage on the Warner Bros. lot and how much of a nightmare that ended up being. 

Turns out Conan suspicions of Letterman sending a gift that was more of a joke than anything else was true, but things didn’t work out exactly how Dave would have liked.

On last night’s Jimmy Kimmel Live, Letterman explained how he really wanted the prank gift to work, then bemoaned how it, technically, worked more effectively (in the sense of causing Conan distress) than initially intended.

Ever the prankster himself, Jimmy Kimmel jumped in with a perfect button to this story at 4:58 of this clip of the interview.