GMod: Garry's Mod

I have to say, Garry's Mod or also known as GMod is a must for any Half Life 2 player! The mod includes everything to make your own poses out of the ragdoll characters (limp bodies) and extra things such as attaching balloons to people and letting them fly up into the air. The GMod has got to be the best mod I have ever seen! Go Garry!
Here is an example of Dr. Breen doing his Ballet classes