Self carving pumpkin, probably not good around small children.
Carve lid, eyes, mouth with a cheap air saw or sawzall employing slight taper to cutouts.
Remove seeds & guts.
Add hole at rear of pumpkin for fuel/air tube.
Add spark device with long wires or garage door opener control.
Insert cutouts back into pumpkin.
Add fuel/air charge as victim approaches pumpkin.
WAIT
When victim is perfectly position, fire spark using BBQ Grill piezio device.
You can generally reinsert the cutouts a dozen times unless you go nuts with the charge.
Female adults may wet themselves when the nice pumpkin self carves.
