When your pet gets confused and turns onto you, the future looks glum.
You throw something in desperation and its direction. All the pet does is pick up the weapon.
This is good. The unicorn horn is not only a sharp weapon, it also cures confusion. The hostile monster, once again, is but your helpful pet.
Unicorns are fantastic to meet not only in Nethack, of course, but also in emails:
›› Send the most mythical creature of them all. (IncrediMail)