In 55 years I've never managed to do that, nor has anyone else I know. Plugs normally stay in the wall socket because they have a switch - each wall socket for general use must have a switch. The switch is quite hefty and very obviously off or on, with a red stripe. You get a satisfying audible and tactile click feedback when it is switched.

Recently a person brought in a laptop that had apparently been accidentally brushed off a desk, whilst closed, and had apparently fallen on an upturned plug. The plug had managed to hit the back of the screen, left quite a dent and spider cracking on the screen. The centre of the cracking did not match the dent ...

I'll have to do some trials but even if a plug is left on the ground, will it actually lie prongs upwards? I'll have to investigate lead torsion and all sorts of effects. Its on the to do list but not very high.