Ah yes M-80s, supposedly a 1/4 stick of dynamite. I don't recall blowing any cars but once my dad let me blow up a B-17 on the 4th of July on the condition that I pick up all the pieces. Of course I agreed (I was probably 10-12). I put it up in the air on the backyard clothesline and lit the fuse! BAM! Spent the rest of the afternoon searching the yard for bits and pieces, the wings basically stayed intact, it was only the fuselage that took it hard. I then took on the project of glueing it back together like a plastic jigsaw puzzle. It actually only had a couple of small holes when I got done. Those were the days.