The Tail Nail is a melee weapon available in Worms 4: Mayhem, and can be used to pin down a troublesome wriggler, preventing them from creeping to safety, fetching an important crate, or moving into an opportune firing position. When used, your worm bashes an enemy on the head with an enormous wooden mallet, burying them in the ground and preventing them from moving. The only means of escape for the victim is either to use a Teleport, or an explosion carves out the piece of terrain that they're currently rooted in.