Tennis ball cannons had a better rate of fire if you used lacquer thinner. Just make sure it’s out before re-loading if you enjoy having eyebrows.
I sprayed a generous dose of ether starting fluid on a dead bat once and then, without matches to flick at it, bent over to ignite it with a lighter. I was amazed to see that it generated a small overpressure wave/dome right before it hit me in the face. Eyelashes and eyebrows and arm hair grew back pretty quick...