How do people shoot themselves in the head when cleaning their gun?

[RifleGuy]

GuyWithQuestions
How do people shoot themselves in the head when cleaning their gun

Well, first I would put it in some sort of vice. Make sure it's loaded first, round chambered. Lean over the weapon and place a thumb on the trigger...

Oh, wait... you weren't asking "how to", you were asking "how does"! My bad.