Chainsaw

The Chainsaw is an option in Infiltrating the Airship and Completing the Mission.

Infiltrating the Airship
If Henry Stickmin fights the Right Hand Man by using the Dirk, he can use the chainsaw by selecting the "Tools" option. If chosen, Henry dons a hockey mask and attacks the Right Hand Man with the chainsaw, dealing 7523 damage to the Right Hand Man and defeating him. This earns the player the "Last Reverie" medal ("Last Fantasy" medal in the original flash games).

Completing the Mission
During the "Toppat Civil Warfare" pathway, in the Mutiny location. Henry can use the chainsaw when he is forced, at gunpoint, to walk the plank and jump out of the Airship. If chosen, Henry saws the plank in half and falls to his death. The fail message says he expected his half to stay airborne and the other half with the airship to fall and crash, just like in cartoons.

Fail Message
Hm. Definitely thought the other side would fall, like in all the other cartoons.

Trivia

 * The Chainsaw is a bundle of references:
 * The Hockey Mask is a reference to Jason Voorhees, an extremely resilient undead killer who also dons the iconic mask.
 * The chainsaw itself references to Leatherface, a deranged maniac and cannibal, widely known for his prolific use of chainsaws.
 * Edgar is a character from Final Fantasy 6 who uses "Tools" in battle. One Tool is the Chainsaw, and like Henry, Edgar can don a Jason-styled hockey mask when using the Chainsaw.