don't try this at home

From a phrase used by announcers in early broadcast television whenever something dangerous or inappropriate was demonstrated in a program that might be watched by children: "Kids, don't try this at home".

don't try this at home

1. A caution that the activity being described or demonstrated is not safe for ordinary members of the public to attempt.

   Don't try this at home, but now I'm going to walk barefoot over the hot coals.

• Now often used humorously, or with no actual expectation that an activity might be attempted at home.