“What I think it looked like:
Imagine being the janitor who removed the metal plate from the wall, only to find a dead man, mute and staring at him, eyes and mouth still open! I can hear the loud violin screechings from The Birds by Alfred Hitchcock.
Maybe there was foul play indeed:
“Dammit, when I say LEAVE the seat down, I MEAN leave it down!!!”
The man’s final mistake: he laughed.