So this weekend on Animal Planet they had three hour long shows on snakes
seven deadly strikes
the big squeeze
and Mutual of Omahas: King Cobra and I

Well I learned some very interesting things about what you should do if your big constrictor (or any snake) latches on to you and starts to coil

they suggest

1.Pour warm to hot water on its head/mouth
2. Pour alcohol on its head/mouth. you can use rubbing alcohol or some gin or vodka..stuff like that.
3.bend the tail back and apply some pressure

those are some tricks that could help you get out of the snakes mouth and stop you from doing something you really dont want to do...like cutting its head off...stabbing it....shooting it..whatever else.

Why im posting this in a Ball python fourm...I dunno..but it could prove usefull.