Flying Copter Stab!!!

The Upside Down Helicopter Stab, or Copter stab for short, is a ridiculously hilarious way to kill any spies who try to stair stab you. It works off the principle that the melee hitboxes are broken, and while this will technically work with all classes, only the spy will be able to get an instant kill from it.

Technique
As a spy, or any class, jumps above you presenting their back to you in midair, look at the ground and swipe your knife. For some reason this will stab upwards and kill the person jumping over you. This video demonstrates it being used in a set-up environment.

thumb|left|404px|Performing the Copter Stab

This video shows it being used in a pub.

thumb|400px|left|The Copterstab in a pub.

=Trivia=
 * The copterstab was created by Lt Cyndi Lauper / SubtieArt and SiN
 * The name Upside Down Helicopter Stab is actually a misnomer - there is no actual turning upside-down or helicopters involved, just looking down.
 * If someone is attempting to stairstab you, the copter stab, while giving you the chance to defend yourself, will actually open you up even more for being stabbed.

A similar and much more effective defense (but less cool and awesome) against stairstabs would be the counter stair stab or the butt stab