This one from Eli Wimmer:

I have a cool trick that sends you flying high. Start on a large map that supports wraith tanks. Then, set weapons to sword and preferably not mandatory overshields and put in the Wraith tank in also. Get one guy in a Wraith tank and the other on foot and face each other. The man on foot will aim slightly below the nose on the tank. Now, in one quick motion jump so the reticle is red on the tank and the tank use its boost as the player on foot lunges by press 'right trigger+X', you will bounce off the tank and fly really high. This can take practice and you have to have good timing.