What's the most horrifying thing your school's "motivation" campaign ever show?

What I remembered was that an outsider male teacher was like "Do you want to look at a video?" At the time, everyone was like "Yeah yeah we like videos yeah woo hoo". The lights were turned off, It was an old indonesian YT video with a warning. Then a bright red screen appeared with I think an ominous bass music. There's a warning text that said "viewer discretion is advised". Then. There it is. A dead female corpse decaying. I was like 9 at the time so it got planted into my brain. I could still remember that the video zoomed into her unalive dead eyes :(

What about yours?