Way to do the freeze jump:

1. When you are in a game press ''START'' then go to invite friends. Invite a friend that is already in the game , once you have invited them turn your controller off then back on again. Press ''BACK'' so you are in game again.

2. Find the spot you want to freeze jump in ( make sure there is nothing above you that you can hit so the freeze jump will work ). Then jump in the air and press ''SELECT'' the screen should go black and should say ''Player already in game'' or something like that.

3. When the screen goes black tell your friend to knife/shoot you a certain number of times. Once he has done that press 'SELECT'' again and you should shoot up in the air.

Hope i helped.