Alright, so not exactly 40k, but he makes a good and interesting point. I found this clip, and many more by David Mitchell on ChannelFlip.com (free plug). One often sees games where one player is dominating the other and, as they should, continues to decimate their friend needlessly. Why? Because it is fun and often funny too. Well, perhaps not funny for the poor soul who is getting trounced. As he points out, the further away from the event, the more funny it can be. So, it might not be so funny to a friend minutes you table him, but wait a week or two and you may all be laughing about it!