1. Two Izuals in Hell mode. Skipped the cutscene, was greeted with this:

http://img265.imageshack.us/img265/5200/hell2xizual.jpg

2. The Prime Evil quest was opened, I assume incorrectly, as a selectable game to join in Inferno difficulty. I'm nowhere near there, but here's a screenshot.

http://img220.imageshack.us/img220/4313/ivinfd.jpg

3. Lastly, a stuck mob from that game in A4 Inf. That's a lot of HP.

http://img821.imageshack.us/img821/9976/stuckivinf.jpg