there is no off switch,ok? but there is a switch that makes the lava flow go slow!when u enter area k4 i think, look up on the screen.you see this trail going up with sipes on the walls?there are platforms . Use model hx or px to get up ther.then keep on goinguntil u see one of the doors.go through that and go through the rest.keep on going until there is a cut screen,there will be LAVA rising up! use model hx and dont ever stop.if low on health, use a subtank(go to cheat website to learn how to get these)and when you get to the part where ther is a door,go through it then youll come to this place.keep going until u see a pitfall.fall in it.then go through the door,there is a machine acsses it then put the lava son slow.then go back up youll see a cable car acsses it then youll come back to k2 then go through the pitfall.