Haz you n00b, you totaly gave away your position, 3 times
I can't understand how people don't get claymores. Its not that hard to place them 5 feet back from a corner or door. At the bare minimum don't have the red lasers poking out from behind the door frame or obstruction.
Most people now know the 5 foot door trick, its the random ones that Killdaddy puts down that get you good.