Ill admit to doing this once. It was late at night and I was with 3 or 4 friends and they talked me into it. The trays were destroyed instantly because they melted so quick. My friend got on the roof of the school parking lot we were in (don't ask why, I just know one minute he's on the ground, next he's on the freakin' roof) but he threw some loose shingles down and thoses worked perfect. lol It was actually kinda fun.