[quote=Zadkiel]
It could be due to a failed raid team's plan. Like the time when Asuna decided to lead a boss to a village, while it attacked the NPCs.
[/quote]

I'm all for this. Perhaps Erin could be there to point out any traps etc. 
Everyone except our group in the raid could die quickly, giving us a chance to observe the pattern and we could be all cool and kill it? >.<

EDIT: Sorry, double post >.<