Quote Originally Posted by pixelfixed View Post
Yep. you can make great explosives also
Plastic soft drink bottle, couple inches water, fold in half, add small pieces of carbide, firmly screw lid on. Throw and wait.

Carbide and water mix = acetylene. Increased pressure + heat in bottle will reach critical and explode.
Generally frowned on by law enforcement (and the neighbours) depending on where you are doing such activities.