"I had a dream that I was a mechanic who fixed…

“Auto body experience” is a pun on “out-of-body-experience,” and there are many jokes.

“Did you hear about the clairvoyant who repaired his fender bender? He had an auto body experience” was posted on the newsgroup alt.humor.puns on April 9, 1998. “Some people do drugs to get an out of body experience. I go to the mechanic for an auto body experience” was posted on Reddit—Jokes on November 12, 2019. “I had a dream that I was a mechanic who fixed wrecked cars. It was an auto body experience” was posted on Reddit—Jokes on February 22, 2021.

Wikipedia: Out-of-body experience
An out-of-body experience (OBE or sometimes OOBE) is a phenomenon in which a person perceives the world from a location outside their physical body. An OBE is a form of autoscopy (literally “seeing self”), although this term is more commonly used to refer to the pathological condition of seeing a second self, or doppelgänger.

Google Groups: alt.humor.puns
Driving puns needed
GREG,
Apr 9, 1998, 3:00:00 AM
(...)
> Did you hear about the clairvoyant who repaired his fender bender? He
had an auto body experience.

Google Groups: alt.humor.puns
“Puns of the Day” 7/28/00
Stan Kegel
Jul 29, 2000, 3:00:00 AM
(...)
A man went into his shrink’s office and says, “Doc, you have got to help me! Every night I keep dreaming that I’m a sports car. The other night I dreamed I was a Trans Am. Another night I dreamed I was an Alpha Romero. Last night I dreamed I was a Porche. What does this mean?” “Relax,” says the doctor, “You’re just having an auto-body experience.

Reddit—Jokes
Posted by u/legal_objection April 22, 2013
What happened when the car took LSD?
It went on a road trip and had an auto body experience!

Reddit—Jokes
Posted by u/fiddlesmallstate November 12, 2019
Some people do drugs to get an out of body experience.
I go to the mechanic for an auto body experience.

Reddit—Cleanjokes
Posted by u/Jtbailz August 28, 2020
I fell asleep at the wheel and when I woke up..
I had an auto body experience.

Reddit—Jokes
Posted by u/Xancrim January 11, 2021
You hear about that mechanic who almost died?
... He had an auto-body experience

Facebook
Rob Carroll
February 17, 2021 at 4:32 PM ·
Weird afternoon. I had this feeling my spirit left me and floated to my car dealer’s service station where I sat for hours, drinking stale coffee while they changed the oil in my car.
“You just had an auto-body experience,” said Sue.

Reddit—Jokes
Posted by u/vicaphit February 22, 2021
I had a dream that I was a mechanic who fixed wrecked cars.
It was an auto body experience.