I guess your talking freeze jump? If so heres a quick speach on how to do it.

1. Create a private game and set it up like this:

*Make the game free-for-all

*Turn old school on

*Turn health regeneration to fast ( so you get your health back quick )

2. Invite your friends and start the game.

3. Once in the game click ''Start'' and invite a friend that is already in the game , then turn your controller off and back on again.

4. Find the spot you want to freeze jump in ( make sure there is nothing you can hit when going up overwise it wont work ) then jump in the air and hit ''Select''.

5. When you do that your screen should go black and should say ''User already in game'' , when its like that have someone in the game shoot your for a certain number of times.

6. Once he has finished shooting you hit ''Select'' again and you should go flying up into the air.

Hope it helped.

no no make the game team deathmatch and put friendly fire on shared thats WWWAAAAYYY easier