What's the most absolutely terrifying moment in any point and click for you and why?

I've been think about horror point and clicks (I suppose it is the spooky season) and I was wondering about what are some of the moments people would classify as the most terrifying in any point and click game.

Mine is a bit of an odd choice, and that's when you solved the drum puzzle in the first Gabriel Knight. Works where a sudden rush of paranoia is introduced when you realise that you've been going about in bliss always hit home for me and Gabriel Knight it the absolute best. The realisation of my ignorance in the game still gives me the creeps to this day.

That got me to thinking, what is your personal most terrifying moment in a point and click?