Kk, kind of hard to explain. Go to one of the hack sites were there are 2 cooling vents (so they seem) next to a wall. Climb up (where the big fan is). Jump over the little ledge on top and make sure you are jumping towards the first cooling vent. Make sure you behind enough it so your guy MANTLES (not slides) onto it and keep spamming "JUMP".
Results are funny. Please keep this glitch, as this is hard to do, and no reward. Just a small fly and it sure as hell is funny.