What's the most moronic thing you've seen your teammate(s) do/say?

KMaus: 6 or so guys on the same team as me, must have all been playing a LAN game together, completely smashed. they're all wandering around like little lost bots, falling off of stuff, getting sighted, drowning, etc (did you ever play Lemmings? it was like that). Then one guy pushes me off a cliff, finds it so funny, that they all start doing it. more than half the team's dead before we even sight an enemy.