Sometimes when i'm listening to music and I quickly, (and a little forcefully), slide the phone from landscape (multimedia keys showing) to portrait (keypad showing) mode. I noticed this turns the phone off, any particular reason why this happens? Maybe I'd better be careful in the future, but it's happened to me more than once.
Anyone else had this problem?
EDIT: I just did it again and found that the phone shuts down even with no music playing. Word of advice... Be Gentle!