The Simpsons Game (PS3/X360) - Mob Rules Easier 100% Route (No Quit-Outs)

faster way would be to quit out after destroying the billboard after first vent section to get lisa next to you. this has the side effect of spawning in all the enemies which makes the ai not wanna cooperate for us trying to skip parts of the level. this is still hard because this level sucks but it is way easier in that one specific section