Free roam glitch- To do the free roam glitch wile your online all you have to do is get in or make a room with the level "Smokestack" and set it on reverse, ok when you start off in the race head forward till your under a highway ( Which isn't too far from the start line so don't go to far , then face the left of the road and you should see a pillar or pole w/e, get to the right of it than use the jump technique (which you can find below) and than you will hop onto of the bridge and can cruise the open city with all your little friends and ... stuff.

I WIOULD PUT ALL OF THEM ON BUT I JUST DONT FEEL LIKE IT SO IT'S UNDERCONSTRUCTION LOL