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.