The Fear Gas Cannon is a weapon that appears in the animated series The New Adventures of He-Man.
The Fear Gas Cannon was a weapon invented by Skeletor to be used by the Evil Mutants against the males of Primus. The Fear Gas that could be released from the cannon turned all human males into cowards, but did not have any effect on women or Mutants.
Crita was selected to lead the assault on Primus and she soon tricked the spaceship Colossus into taking a seemingly abandoned ship aboard on which she was hiding. She used the Fear Gas Cannon on the Galactic Guardians Flipshot and Kayo, who immediatelly succumbed to it's fear inducing gas. Crita then proceeded to spray Primus with the gas from aboard the Colossus.
Master Sebrian, despite being affected by the gas as well, managed to recall that the water found in the Fountains of Enos may hold a cure to the Fear Gas. He-Man and Gleep managed to retrieve some of the water from the moon Enos in order to rid the male population of Primus of their fears before the Mutants managed to take over the entire planet.