Man trying to cover his face, Pompeii

Maybe he doesn't want people to know he's stoned

So you're telling me people have been trying the Tuck and Cover technique for thousands of years without success and yet they still try and teach it?

The most unnerving one I've seen is the dog that was tied to the post and died on its back when it's leash ran out.

:-(

BUT IF YOU CLOSE YOUR EYES

Duck and cover!