M-80's! When I was a kid, I stuffed an M-80 into the window of a built '49 Ford coupe (I had to flatten the M-80 somewhat). Then I carefully placed it in a metal trash can (remember those?), lit the extended fuse, put the lid on the can and stepped way back. When the firecracker went off, it blew the lid off the can.
That '49 Ford was obliterated!