I just had to share this it was so funny (to me anyway). If any of you have watched fails of the weak by Achievment Hunter Video 31  has somthing similar .I was playing on Thanes recrutment mission and you now before you cross the bridge there are mercs working on explosive, just after the locker. Anyway at this bit I always use the Cain and aim it at the left merc working on the explosives. Today was no defrent I for the cain at the merc and guess what. The projectil goes right through the space between the merc and the explosive and explodeds on the building across the bridge.
So I wonder if anyone else has had somthing like this happen in ME2 or ME1 or even a funny fail.