Pete Davidson explains how he and Machine Gun Kelly fell off the 'SNL' stage because of the rapper's bruised coccyx

• Pete Davidson said his fall with Machine Gun Kelly was caused by the rapper's bruised coccyx.
• The comedian said the rapper had to carry around a "tushy cushion" in order to sit comfortably.
• The two went tumbling off the stage in a January episode of "SNL" hosted by John Krasinski.

Pete Davidson gave the full story behind his on-stage "Saturday Night Live" tumble with Machine Gun Kelly during an appearance on "The Tonight Show Starring Jimmy Fallon" Wednesday night.

In a January episode of the long-running sketch show, hosted by John Krasinski, Machine Gun Kelly (real name Colson Baker) attempts to lift Davidson onto his shoulders as the credits roll, however, the two go tumbling off stage backwards. The moment was caught on camera.

-Saturday Night Live - SNL (@nbcsnl) January 31, 2021

On "The Tonight Show," Davidson explained that Baker had bruised his coccyx before the "SNL" appearance, even needing what he described as a "tushy cushion" to help him sit comfortably.

"If you don't know what a coccyx is, it's the bone in your ass," Davidson said.

"So he couldn't like walk or sit. And he had like a tushy pillow as well. It was just really cool to see like the most gangster thug dude I know, just like put a little tushy pillow down to sit," he continued.

"Yeah, just like Megan Fox is right there and he's sitting on his little tushy pillow," the comedian joked, referencing Baker's actress girlfriend.

Davidson said Baker attempted to plan the lift before the show aired, saying he wanted to do something "silly" as the credits rolled.

Unfortunately, when it came to the moment, Baker's injury meant he wasn't able to lift 6-foot-3 Davidson, the comedian explained: "He forgot that he had a bruised coccyx. So he like went to pick me up, and then, he couldn't go up, so he just started to slowly tilt back and he went, 'Oh, no.'

"And it was such a slow fall, we had time for him to go, 'Oh, no,' and I went, 'You're a fucking moron.'"

Davidson and Baker are good friends and have starred in two movies together: "Big Time Adolescence" (2019) and "King of Staten Island" (2020).

The two also worked on the Netflix Mötley Crüe biopic "The Dirt" in 2018, which Baker explained forged their friendship: "We were stuck down there [filming] in New Orleans and we were both super stoners, listen to the same music. That's my boy," the rapper told Billboard at the time, via PopSugar.

Watch Davidson's full interview on "The Tonight Show" below: