Adding Idle Animations to ragdolls?

Hi all,

I’ve slowly been getting on with learning the basics of making Machinimas within Gmod (the new work shop and kinect feature makes it pretty damn easy to be honest!) But one thing I can’t figure out/find online, is if it is possible to add an idle animation to a ragdoll? I basically want the ragdoll to look like it is breathing rather than just looking like a statue with a moving face… This might be pretty obvious to some, but I just kind figure out how!

Thanks!