Dax Shepard "needs surgery" after an accident on a racetrack in California.
The daredevil actor suffered four broken ribs and his clavicle's (collarbone) broken in three places after he went over the handlebars in a motorcycle accident.
Speaking on his 'Armchair Expert' podcast, he recalled: "I was passing six guys on Sonoma Raceway on a motorcycle and I was braking very, very hard -- hard enough that the back wheel was off the ground for a good 100 yards.
"I was totally at blame. I thought I would be able to slide in between, but someone turned in and I was already under full brake and I couldn't go anywhere.
"I clipped their bumper and I went over the handlebars and I landed pretty hard."
He continued: "I've been at the hospital for seven hours today.
"The final tally was four broken ribs, the clavicle's broken in three places, and I need surgery."
Following the podcast episode airing, the 45-year-old star took to Instagram to thank all the listeners for their concern and get well messages.
Alongside a topless selfie, in which his bruises were on display, he wrote: "Thank you Armcherries for all the well wishes and concern. I'm in one piece and spirits are high. Sorry for causing concern. (sic)"
