We're playing with a a few friends on HC. We're currently only in ACT IV normal, mostly just farming xp up to ~38ish and if you've been following any Whimsyshire guides, you are probably aware that Izual drops the recipe for the staff to whimsyshire. The cool thing about the book, is the fact that it's account bound, so you can drop it and someone else can't take it. What's even more awesome, is dropping the book right after you killed Izual, making your friends believe that they got the drop, but can't pick it up, for some weird reason, while you keep a straight face and ask whether perhaps his inventory is full. Wait and watch, while the frustration ensues and tickets get made
In this particular case, he's still not aware that we fooled him, so we'll be doing it a few more times