Seth MacFarlane’s appearance on The Tonight Show With Conan O’ Brien was cancelled last night when presenter O’ Brien fell during the taping of a skit for the night’s episode.

E! Online says he was running down a flight of stairs when he tripped and banged his head, and was taken to hospital. “Last thing I remember I was enjoying the play with Mrs. Lincoln, and the next thing I knew I was in bed being served cookies and juice,” O’Brien said afterward.

Seth’s appearance on the show has therefore been rescheduled. Best wishes to a speedy recovery for Conan O’ Brien.