Unrealistic, weightless ragdolls physic for all CSS models...
Try it out...Although it's not real, but it's fun to see the body flying away..
Recommended Weapon to test the physics: Shotgun and Machine gun..
Try do a headshot with the shotgun and the models will do almost a 'backflip'.
Other video, but this time the framerate is better. (Watch when I threw the grenade)