Ex Jack in the Box Star Critical after Motorbike Crash

9/8/2010 8:05 PM PDT
Rodney Allen Rippy -- the chubby cheeked kid in those '70s Jack in the Box ads -- is in critical condition after a motorcycle crash ... TMZ has learned.

Rodney Allen Rippy Crash

According to his publicist, Rodney was thrown 10 feet in the air when he wrecked his dirt bike in North Carolina on Monday -- but he didn't go to the hospital until today when he had trouble breathing. Rodney -- who's now 42 -- suffered broken ribs and a punctured lung. We're told he's recovering in the trauma unit.

Besides Jack in the Box, Rodney had a small role in one of the greatest movies of all time ... "Blazing Saddles."

All growed up, Rodney belted out a "Jack" jingle when we spotted him earlier this year. Smaller cheeks, but still super cool.