I made a taser / stun gun using a boost converter, momentary switch, LiPo battery, and two finishing nails. Super simple to make! Please do not try this at home!
boost converter: https://ebay.to/3frYZ0w
momentary switch: https://ebay.to/2QpLkhU
2 cell LiPo battery: https://ebay.to/33OVKuA
finishing nails: Home Depot ?
3D Printer: Ender 3 v2
Camera: GoPro Hero 9 black