Only the host can start Freeburn games and at least one other player is required to start the Freeburn gameWhilst in a Freeburn game the host of the game can start one 4 Freeburn game types (Road Rage, Stunt, Cops and Robbers and Marked Man)
To create a Freeburn game press

on the Dpad - Freeburn Online - Create.
After a little while someone will join (they only need to be in long enough to start the Freeburn Game) once someone has joined game press

again - 'Freeburn Game' and choose Stunt Run, the Freeburn game will begin the game and the trophy will pop.
There are 3 other trophies for this type of game