Disembation 

To masturbate with one's severed limb. The removal of said limb can occur by any means; be it natural disaster, self-mutilation, or mutilation by others. Also can be referred to as an extreme "Stranger".

Crub: I heard after James Franco severed his arm in 127 hours he decided to masturbate with it.
Demecs: Yeah, he chose disembation over masturbation.
Crub: Good choice!

Disembation by ROVR March 17, 2011

disembikation 

The practice of getting off of your bike in a rapid purposeful manor. This can apply to city people needing to avoid a puddle so their shoes do not get splashed or more importantly the country gravel road bicycle rider needing to prepare an emergency defensive barrier between yourself and a pissed off farm dog.

I was riding in the country today when a pack of dogs came after me. I made an emergency disembikation to keep them away.

disembikation by sugarbike August 15, 2012