you can jump on 2 players icons, and it will start the rampage or free mod. i belive the icon is red. havn't played long time there is one near woozie's house. or there is one each of your every girlfriends' houses.
u can only do it when u go inside the little icon that shows up at one of your girlfriends' houses but sometimes they show up in other places too it's a red icon with 2 people standing next to each other and it spins