This one. It's a wedding reception, people are dancing and celebrating, not a care in the world. In a few seconds, the floor that they're dancing on will collapse and they will fall two stories. Many of them will die.

This is from the wedding hall disaster that occurred in Jerusalem in 2001. I watched this incident when it was first reported on, one time, and it scared me in a way that I've never been scared before. It scared me more than watching 9/11. Watching those faces turn from being joyous to terrified, the sounds go from a locomotive of happy chatter to a chorus of helpless screams, for just a second before they all disappeared, shook me to my core. To this day I cannot bring myself to watch the incident again, my fingers won't dare press play.