Get real, folks, the diablo you all knew is dead, a few years ago i said right here in this forum that D3 had a pretty good chance of being blizzard first bust (i was flamed to death ofc), and what you know, its not even beta and its already looking that way.
The siege beast did it to a barbarian player... It wasn't an NPC.
Sorry if this is on the third or second page...
Uh, no, watch how the Barbarian follows the human controlled Witchdoctor around, watch how the whole party follows the Witchdoctor around when they're battling, they follow in formation, they're just NPCs, just like the two rogues when they meet Deckard Cain.
Unless those are some real good step in line tactics from a human player, they're NPCs.