I am a long dense snake that makes you boil,
The denser I am, the hotter you get.
I have no skin, no scales, no coil.
But I move along the ground, slow to a crawl.
I have many different voices.
A rhythm, but no beat.
You’ll know when you see me;
You might even have to take part.
Escaping from my clutches
will bring you some ease.
Now you’ll get where you’re going
as fast as you please.
What am I?