My freshman year, I spilled soda all over my alarm clock. Surprisingly, it still works. The snooze button will get stuck every once in a while but that's it.
The other day I was at the boyfriend's and I set the alarm clock for 7am so I could be up for work. Yawn. I didn't realize that I accidently set it for 7pm.
Around 7:55, I randomly woke up and realized that I had to be at work in 5 minutes. That was hell.
Another time, his alarm clock never went off. It was set correctly and everything. I ended up missing a quiz I had in class that day.