Jump Particle detect (Not flight detected)

I've been in search for a script that needs to emit particles upon jumping, as similar to the common Jet-like flight packs that when your flying are emitting particles from their engines. But at the same time I'd like it to be able to emit the particles when jumping, it be also useful for it to not continue emitting during falls. Example: I'd hate to jump off something, for say a building, with the effect going and start falling with it still emitting.

If someone has a general idea what I'm looking for, could you either IM me inworld or send a script version with modify permission to add in my particle effect. I'd be grateful towards you for assisting me out on this.

You can call llGetAnimation on the avi's Key and if the avi is "jumping" that is the string that will be returned....based on that you can make your object spit the particles you'd like