What is Don't Try This At Home?
1.
Anything that's fun or dangerous, from the lawyer warnings on TV commercials. See professional driver on closed course.
Look, he's skateboarding on top of a 767!
Don't try this at home.
2.
Precursor to something that might be construed as dangerous or requiring arcane knowledge.
Comes from television commercials featuring people doing insane stunts.
"And now,
Doctor Science is going to drink the liquid nitrogen! Don't try this at home, kids, remember, he knows more than you do!"
