Large Milo (or similar) tin, drill a hole in the middle of the bottom of the tin, poke a shoelace through, knot one end and dunk the other in some kerosene. Squeeze shoelace and pull, vibration from your fingers echo's up through the tin, have heard one and they are bloody impressive if you get the technique right. So expensive as well.... Another pro is you get to eat a whole tin of Milo![]()
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