I've managed that part.  I'm more concerned now as to what might have triggered this, and if it could grow into a larger problem.  I was digging backwards working towards...

No error, just any attempt to touch that sp (exec, drop, alter) from either QA or EM hangs. 

I'll give that a go.  Question, though.  Is this likely what's preventing me from dropping the proc?

Kill 55 returns the Rollback Status message as well.  The odd part is that it shows 100% complete and 0 Seconds remaining.