My Honda civic was rear ended?

And i just got my car back from being fixed at an autobody shop. They mentioned that my car took à pretty big hit so when i was driving home. I noticed that something Seems off when i waw driving m'y car and thé gas pedal vibrates.

What would be a cause for a gaz pedal To vibrate?

Yes, go to a professional mechanic and get a lawyer to sue

I'm guessing there's something out of alignment or out of balance that's causing the car to vibrate.

Take it back to the autobody shop and ask them.