Instead of a conventional prosthesis, he chooses to attach a portable weed whacker. The neck is made of red oak, the strings are nylon weed whacker twine. Grepper designed the Coolest, initially using a weed whacker to build a portable gas-powered blender. The old western term of "bushwhacker" was morphed into "Busch Whacker". The bull whacker would walk alongside the bull train and crack his whip. A "bull whacker" is guiding the teams with a long whip mounted on a pole. I cited "Turtle Island" as a blatant whacker, and Gary defended it strongly.