I read long time ago, that sailors in the past who climbed ship sails used Wharncliffe knives specifically. If the knife fell it won't stab anyone under, as the knife's tip is not centered, and the center of garvity of the knife is on the back of the blade, so it most likely fall on its back.

In these days, this can be applicable to electricians or handy people climbing ladders with someone down assisting them. It is worth considering if it proves to be true.