yes and no.
well my idea is to have a physics ball, and it rolls on the level till it finds a "fan" in the ground that makes the ball rise in the air and can go to another plataform that is in the sky.
the example you send was ok. but if i change the car physics "Inmobible" to "no", the game just go very very slow, and it dosnt do the same effect i want!
so i think i need like a physics force or impulse that is all the time "on" so when my ball go thru the fan it will fly.
but i cant make it happen!
Sorry for my bad english.
i hope you can understand the idea i have in mind.