Something that definitely happened, via The National Enquirer:
Driving toward the Burbank studio where he shoots The Tonight Show, JAY LENO spotted a woman pulled over on the side of the road looking helplessly at a flat tire.
Ex-mechanic/car buff Jay, known for playing Good Samaritan to stalled motorists, stopped and changed the poor thing’s tire, and she thanked him profusely – then fretted she’d probably be late for work.
Asked Jay: “Where do you work?” Suddenly looking trapped, the lady blurted: “I’m a production assistant on…the new CONAN O’BRIEN show.”
After an awkward pause, Jay said: “Well, tell Conan I’ll be watching!” Then off he motored [...]