Robert Carradine -- the star of "Revenge of the Nerds" -- was involved in a horrifying car accident with a semi-truck ... TMZ has learned.

The head-on collision occurred last week on a Colorado highway at 3 PM. According to the police report -- obtained by TMZ -- Carradine crossed the dividing line and slammed into the truck.

Firefighters removed Carradine from his car and he was rushed to a nearby hospital with "incapacitating" injuries.

Carradine's wife was in the car and also injured.

http://www.tmz.com/2015/03/12/robert...sh-semi-truck/

OMG that looks bad

ohhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.

Hope he's okay This is horrible

Omg NOOO .

That's horrible omg. I hope he's ok.

..... What's his current condition?

Aw damn.

Hoping he pulls through.

Oh no

That looks terrible Hope he gets through OK.

that looks horrible, hopefully he will be ok

Omg I hope they pull through.

That sounds and looks so bad

hope he pulls through

a week later and were just finding out now

Oh my

omg I hope he'll be okay!

Hoping he recovers well

Hope he's ok