The possible scenarios that could have caused this strange phenomenon are:
- Some kind of bug in the game designed to piss me off (I've encountered them before).
- A connection error or lag.
- Someone else has been playing my account (no other signs point to this).
If I had of died legitimately I would have accepted it with honor. This is just upsetting. Nothing I can do now except curse ArenaNet, my ISP and my bad luck.