Pour expanding foam in the sun roof of Bam's Hummer and he will never drive it again or you could line the car with plastic so you could get it out. Keep in mind that even with the plastic it will break out all the windows and maybe the windshield. It's expands really fast so you have to be quick. Your best bet would be to mix four 5gal buckets at once. The faster you mix it and the hotter it is outside the faster it will expand. Also there is several types of this foam some of it is weak and will fill up the space fast but do little damage. There is a foam that is hydraulic and will do some real damage.