Last night I was running Brayflox (boot attempt #20+) with me as tank and my brother as drg. Now we are both significantly overleveled and well geared for the run. As an inside joke, he constantly tried to pull hate on minor bosses. As a counter-joke I deliberately let the coerl boss take him. Now, when the healer kept trying to keep him up, I had to apologize for not filling him in on the gag. Now, we were sailing through this run and everyone was in high spirits. With that in mind I figured a little light humor was appropriate. The healer (once told) laughed as well. There's an example of how detrimental behavior can be intentional but for a good reason. It was on a bonus boss and an easy one. In retrospect, I should have let the healer know before so he didn't panic lol, but frankly, I was hoping my brother would KO. I hope no one was there and thinks Im an ass.