once on roof jump on the other roof with the blue air vent.. better spot!
go to top of the 3 story.. get a team mate to stand/crouch *what evs works for you* on the housing bit over the stair cases.. jump on him then jump on top of it.. once on to jump on the fencing surrounding the top of 3 story.. then jump on the roof near the tree happy sniping..
there is more i will show like when in the glitch tonem supplied you jump onto the HUGE building across from this glitch.. once there you rocket jump to land on heli and bounce ontop of another building =)..
umm yeah there is another one ask me =)!