NOTE: All these glitches work, I have tested them and they take a few trys to do.

Non Drop glitch:

When A spy is pulling you over the rail, Press start then B B really quickly and instead of falling and dieing you will land on the spys head killing him, then you land on you're feet.

Retarded Spy Glitch:

On the Map warehouse underneath the ladder and behind it there is a beam that supports the ledge coming out of the corridor fomr the Mercs spawn. stand next to the beam with you're back to the wall and do a split jump up between the beam and the vent. Once in split Jump pull out ur gun and point it as far to the right as you can. At this point get a fellow spy to shock you, right when you get shocked press the X button and you're spy will drop to the ground with his hands in the position as if he were holding a gun, but its not there.