Jack Black sustains injury while filming final episode of 'Conan'

The final episode of CONAN aired Thursday night, and to help Conan O'Brien close out his 11-year run on TBS, comedian and actor Jack Black stopped by sporting a couple brand new accessories – a cane and a leg brace.

Wanting Conan's last show to be extra special, Black had planned a big pre-taped musical number, during which he would pretend to get injured and carried out by the paramedics, only to escape and run back into the theater. However, as irony would have it, he actually got injured for real.

Conan shared that the funniest part of the story was when they asked the ambulance on set to help Black, only to discover that they were actors hired for the bit.

"Today, just to be safe, I got an M.R.I. and they were like yeah, no, it's a real sprain. You've got some damage there. You're going to have to take it easy. No dancing, no running, no physical craziness for a while, you're going to have to heal up. And I was so bummed, because I was like I wanted to be the best guest of all time for your final episode and, instead, I am literally the lamest of all time," said Black.

Conan said that, while he was sorry Black got hurt, it also "felt fitting" for his show. "Of course we would think of a bit with Jack, where Jack pretends to get hurt and, while shooting it, Jack gets hurt. We're the only show in the history of the medium that would ever do that. It's somehow fitting," said Conan.

However, a sprained ankle wasn't going to keep Black from making Conan's last episode epic, as he pointed out that the doctor didn't say he couldn't sing, and launched into an epic rock performance, that had Conan tweeting: "I asked @JackBlack to be the final guest on my TBS show … and BY ALMIGHTY GOD HE BROUGHT THE THUNDER." (@ConanOBrien)

Video Transcript

[SOUND EFFECTS]

JACK BLACK: (SINGING) You are the best. And so is Andy. You rock. You make us laugh. You are so sweet, like cotton candy.

KYLIE MAR: From the Largo Theater in Hollywood, the final episode of "Conan" aired Thursday night. And to help Conan O'Brien close out his 11-year run on TBS, comedian and actor Jack Black came through sporting a brand new accessory.

JACK BLACK: And today, I went and, just to be safe, I got an MRI. And they were like, yeah, no, it's a real sprain. You got-- you got some damage there. You're going to have to take easy. No dancing, no running, no physical craziness for a while. You're going to have to heal up.

KYLIE MAR: Wanting Conan's last episode to be extra special, Jack had planned on pre-taping a big musical number during which he would fake an injury and get carried out by the paramedics. But the ironic part of his story is that he got injured for real.

JACK BLACK: And I was so bummed because I was like, I wanted to be the best guest of all time for your final episode. And instead, I am literally the lamest of all time.

KYLIE MAR: But Jack surprised Conan, as he pointed out that the doctor didn't say he can't sing and launched into an electrifying rock performance.

JACK BLACK: (SINGING) He's tall. He's really pale. He has red hair, like Howdy Doody. But more, much more than this, he did it Conan's way.

KYLIE MAR: So while we may not have gotten to see that epic pre-taped musical number, we did get to see an epic musical performance, which had Conan saying, "by almighty God, he brought the thunder."

JACK BLACK: (SINGING) The record shows he took the blows. He did it Conan's way.

[CHEERING, APPLAUSE]

[SOUND EFFECTS]