Call of Duty Multiplayer Help: Crouching and Laying down

When you're in the middle of a gun fight Laying down or Crouching can
 get you out of harms way weather it be an enemy shooting directly at you or
Laying down behind a car, wall or anything to provide cover, this lets you
get some health back and finish off your enemy!

Multiplayer on Call of Duty can be rough
 But these little tricks can give you a slight advantage
and score you some sweet kills!

  -Stay frosty and DOMINATE Call of Duty Multiplayer!