In Secunda's Kiss, Red Road Pass, Tumble Arch Pass, and Steamcrag camp, you can find a weapon called the giant's club. You can not pick it up, but you can use a glitch to have a companion use it. All you have to do is take all of the weapons from your companion, tell him/her to pick it up, and they will be carrying it. They can even use it and can do damage. However, it is impossible to take it from your companion.
Contributed by Arachnus