This topic crops up in various text around the site. It is a subject many magazines shy away from. Describing techniques carries the risk of being blamed for any accidents if somebody who has read (or mis-read) sustains an injury or dies.
This, in these days of hyper-litigation, is a topic in it's own right. Also, "Health and Safety" officials have become a breed of facist.
What the hell - this is an educational site. I intend to write a lengthy article about what is variously called ...
AUTO BONDAGE -
SELF BONDAGE -
SELF APPLIED BONDAGE -
SELF RESTRAINT
but don't hold your breath
Jim - April 2008)