Well... both are stupid...
1) a long time ago at Madstone Crater I followed someone who jumped... into a no-exit lava pit.
2) yesterday, in the Genesis Point maze - I jumped across towards the middle part of the bridge, hit something (the wierd light beam?) and died. I looked at my combat log to see what killed me and saw something like this: (Combat) You were killed by ... and saw my own name. Apparently I killed myself.