14 (IT), it was because he was one of the worst teacher in my life, he forced us to do presentation (manually, no Power Point), and never taught us anything about computers.
I've been listening to music a lot since I'm 4 years old. But back there I was listening to terrible music, I just didn't know since I was a kid. So I'm just going to say 13, when I stopped liking rap music and discovered DnB and Japanese music.
16. Was watching a concert of a band, then suddenly the pc turns off. Burnt smell in the air, and some seconds later, fire appears from the energy connector leading into the HD. Never found that concert again... I didn't do anything :,(