Ok, couldn't resist...especially since this happened to me an hour ago...

Ok, raid leader calls for heroism to be popped, but forgets to look at the debuff of the LAST time it was popped still on half the raid for about 30sec....and I mash the hero button, blowing the CD for zero effect on half of us. Wipe then ensues on boss....first time was Hodir I think...tonight was running a guildie thru kara .... had poped it on netherspite for quick kill...then tried to pop again on the shade.....couldn't figure out why nothing happened..


And another one:
A priest friend of mine was queued up for heroics as a DPS, I invited her to my mag's lair raid as heals, but she missed that message....we had already cleared the trash, just boss left. So we all got ready, with only me and 2 lvl 70 healers in quest gear healing(priest friend still in DPS spec), the pull starts, bosses health starts going down, but the damage everyone is taking is too much for us to keep up with, and one of the lvl 70 healers dies...and then the other....and we barely manage to down the boss with 4 out of 8 ppl left....my priest friend then asks if it would have been better had she been in holy....

This one is FUNNY:
As a joke, my GM suggested wo go raiding naked, or in clown suits(what I did, lunar robe plus a bunch of cool looking green armor I had), low level content, its put to a vote, between kara, ZG, AQ 20 and MC....MC is the lucky choice, so we all run in there, get ready to go and everything...charge first boss, and die. Everyone is asks what happened, why did we all die, no one knows, so we try again....and suddenly I notice that no one is healing....I take a look at all the people we brought: Me on my lock, a rogue, 2 mages, a hunter and a DK. No one could heal enough to keep us alive while naked or in clown suits...funniest MC zerg run ever tho, once we got a healer to come along.