Mine was only partially true. I removed things from boiling oil with a fork, then immediately picked it up off the fork with my fingers.

Others from personal experience:
Never drink from a water fountain without first testing where it sprays to.

Never cut your toenails with a knife.

Never light a tissue on fire without first having some plan for putting it out or some place to set it down.

Never try to blow out a tissue that has been lit on fire unless you want bits of burning kleenex to spread all over the place.

Never let bits of a burning tissue fall onto your computer keyboard.

I'm sure I could list a few more things and ways not to light things on fire.