Turn colliders off in script

i have my worm game made from tornado twins tutorial however when i hold back arrow my worm is colliding with all the other pieces of my worm causing it to go up in the air so how would i go about

if(Input.GetButtonDown("s")) get rid of the collider

unless you have a better suggestion on how to get rid of this glitch

please help thanx ;)

First Solution:(physics are gone)

 if(Input.GetButtonDown("s")) isTrigger = true;

Second Solution:(Ignoring physics with OTHER colliders)

Physics.IgnoreCollision(AnotherObject.collider, collider);

Dude i had the same problem, just make your the back pieces are off the ground, arnt touching or turn them of in the editor? Its pretty straight forward