We are going to use the same character as in the Creating a humanoid ragdoll with the ragdoll wizard recipe. We will also use the HandleRagdoll.cs script from the same recipe to turn the ragdoll on. On top of that, we will need to have two additional meshes: the Head model and the Neck model. See the following screenshot for reference:
Neck and head models
You can also open the example Unity project and go to the Chapter 09 Physics and animationsRecipe 07 Dismemberment directory. If you open the Example.unity scene there, play the game and press the space bar so that the poor character will be decapitated. You can find all the additional models in the Models directory.