Playing Hardcore, just after building a Ruby Staff, murdering Cthulh, EOW and Skeletron, digging around a bit, tripping a dart trap that was CONNECTED TO A BOULDER TRAP. I almost flung my Vita across the room.
I made a mob farm that had one slime statue, I spent 4 hour semi-afking the slime farm. I got 11 stacks of of gel, not slime staff. My cousin hops into the slime farm while I go mining and gets the slime staff when he has 47 gel. He ended up getting a second slime staff the next day from a normal slime kill and he gave me that.