What things have your group just horribly failed at even with the best intentions. Our group always seems to aim in the right direction but at the last second veer off and do the totally wrong thing.
SPOILERS
To give you an idea of how bad we are, we killed Smeed and Smoot (to be fair our GM misread it a bit and so their conditions for surrender where not quite as easy as they should have been). Then we managed to track down the windmill and failed to catch the Slaugth and so failed that mission.
/SPOILERS
We had a Dauntless destroyed after heresy was unrooted aboard, I say unrooted we only found out when we were sealed in a room with the long dead captain and left to sufficate, luckily one of our group had a las-saw. After our escape we faffed about ineffectualy until escaping and letting the Navy admiral, who we had contacted before, know that the second in command was a traitor and left it in thier hands. The Dauntless then opened fire and was promtly obliterated buy the cruiser squadren parked uo along side it.
After that we left to save our Inquisitor who had been captured. This did not go according to plan either. By grabbing our Inquisitors Interrogator (who we dubbed Billy because we obviously couldn't pronounce his name) we were able to commandeer a couple of cobras and 2 squads of guard vets to help us save the Inquisitor. We arrived at this farm building after following a huge arrow burnt into some crops that we saw from orbit, stormed the building with our guardsmen and recovered the Inquisitors rosette before tripping a security measure/booby trap that sent a message to some bloddy EARTHSHAKER emplacements and got shelled. Luckly we survived the shelling (the house didn't) and set off in search of those earthshakers which we found when the started shooting at us at short range. Well it ws only one really and a lucky hit from a frag missle killed all of the crew. We then found the enterance to a secret underground facility that we then learnt was this strange prison for increadibly powerful psykers, we knew that our Inquisitor was a pyromancer so we went to the door that was glowing white hot (all of the guards had gone insane for some reason soon to be made apparent). We shot the door with a plasma gun in order to help it along as one of our other guys started wandering about, and found our Inquisitor in an other cell. He was let out and really surprised the rest of us when he walked through the door as the door we had shot began to give way. We made began to retreat very quickly at that point.
There is more that I have left out that we did wrong but how about you guys, any really silly stories.