We had this thing at our HS called "Every 15 minutes" and it's about drinking and driving and how there is a death/seiours injury related to D&D every 15 mins. There was a simulated car crash (cars, people through windows, fire trucks, the whole shebang, even a helicopter.) But the crash wasn't why I cried, this lady whose daughter was killed by a drunk driver spoke and she was a terrific speaker. She was re-telling the story of the day her daughter died.
Also, for my friends that "died" their parents wrote letters to them, as if they had really died and that was extremely sad. 🙁
The last time I CRIED cried was when I was having a breakdown on how I completely messed up my HS career and how I'm a failure. Good time.