Some good ones here. Mine: On the fast travel ship at Ebonheart there's a cliffracer on the coast nearby when you reach a certain level. I shot an arrow at it and fought it, but when it died, it went straight through the boat's deck and sank to the bottom of the ocean. Greatness. When you get the decoded letter from Caius, the bottom says 'look forward to reports your reports'. Made me chuckle, anyway. Rats start running away from you when you reach a certain level. Hilarious chasing down the little vermin and hacking them down as they attempt to flee.