Stuff the potato down the neck with a broom handle, add a little starter spray to the back chamber (2-1/2" ABS), quickly screw the voss plug in, and hit the sparker. It was a good way to get rid of potatoes that were getting too soft to cook.
I once watched (from a distance) a group of excited young men fire a potato into the air-straight up.
The Titan Tuber ascended at tremendous speed to a tremendous height-straight up.
The men hooted and hollered with joy as the potato shrank from view and the starchy projectile flew away -straight up.
Then, there was a moment of silence, as the young men pondered a long forgotten science lesson, the one about gravity. When they realized that their ballistic produce had not only failed to achieve orbit, but was descending at a terrifying rate of speed-STRAIGHT DOWN!
They scattered like startled chickens just in time to avoid injury as Mr. Potato Bomb arrived at its exact point of departure and exploded into a million pieces on the asphalt.
It was quite entertaining.