Conan O'Brien was injured while filming a skit for his show this afternoon and was unable to continue taping, this according to a rep from NBC.
Here's the statement from NBC, which includes a quote from Conan:
"Tonight, NBC will broadcast a repeat of 'The Tonight Show with Conan O'Brien.' Conan hit his head doing a stunt and the show was not finished.
Conan O'Brien added, "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."