Mysterious Disapperaing of Model during certain frames

I am attempting to animate a rig I received off of BlendSwap. After creating my second action, over frames 200 to 263, the entire model and some parts of the rig disappear completely but are not hidden. Also, they are set to be rendered but they are not rendered across those frames only. They show up before and after those frames for the Ballon Walk action. For the slumping action, the model is okay. Thanks in advance for your help.Simple_human.blend (3.16 MB)