Once you get caught in it, every effort to get out of it only tightens the noose more 'round your neck.

Most well intended help from passers by, ends up tightening the noose further.

Approaching predators make you pull away in desperation, which only tightens the loop further.

Specialists are called to the scene but they are unable to get you out of the rope, but they may offer you some things to make you more comfortable while you wait for a solution or the end.

So, what's a man (woman) to do once he/she gets his/her neck caught in a snare?

Is there any way to get free from a snare?

Note:Hands/feet are unuseable.

Hint: First measure is to lay very quietly, no panic, to asses situation and see what can be done.
But then, what?