Weird glitch and possessed cat

Ehhh yeah that doesn't look right, lol. 
Do you use any mods or CC that might be causing this issue? Could you test the game without?

No, I stay away from mods and custom content. I tried to repair the game, it worked for a while, then a Sim got stuck in a piano. 

What your Sim is doing is known as a T pose. I wonder if it's related to this bug report:
https://answers.ea.com/t5/Bug-Reports/NEEDS-INPUT-Reset-Object-Cheat-makes-Sim-get-stuck-in-T-Pose/m-p/7171748#M75799

Did you use the cheat to reset an object?

Yes, I did. The game was already acting pretty 'glitchy" before that though. Hopefully, they find a solution soon. 

I hope so too! Feel free to leave a reply to the post so you get subscribed to it. 

Or just hit the 'me too' button.