[Wonder Warthog]

"Not completely: kinetic energy easily translates to heat, enough heat to ignite things. Coupled with easily ignited gunpowder, it would be close to certainty."

Don't need heat....impact will do the trick. Take a very small amount of firecracker powder and hit it with a hammer.

[GingisK]

...Don't need heat....impact will do the trick...

Impact causes heat. That is just plain old ordinary run-of-the-mill physics.