The air conditioner is bouncing around in my trunk

I opened my trunk and there was an air conditioner slightly broken from all the moving around.

I think there is something wrong with my car. There is loud banging in the rear part and it’s making me nervous. Every time I hit a bump I hear a bang. I hope there is nothing with my struts or anything. I really don’t want to spend money to have a mechanic repair my car. Doesn’t matter, my anxiety kicked in and I couldn’t drive to work anymore as I was scared that my car would fall apart driving to work. I pulled up to the mechanics shop but it wasn’t open for another 15 minutes. I didn’t mind waiting 15 minutes because I wasn’t going to drive anywhere. After 5 minutes a mechanic came out and said, “I see you arrive a bit early, can I help you.” I told him that I think there is something seriously wrong with my car and asked if he could look at it. He said, “no problem, let’s bring it in.” After a few minutes, he said there was nothing wrong with my car. I was highly confused and told him I was hearing loud noises when I hit bumps on the terrible roads we have. He then asked if I checked the trunk to see if there was anything in it. I opened my trunk and there was an air conditioner slightly broken from all the moving around. I forgot that my husband had an HVAC technician install central air conditioning in our home and I was giving this to the thrift store. I felt like a dummy and told the mechanic thanks for helping and I guess I have a broken air conditioner to throw out now. He told me he’ll throw it out and don’t worry about paying him anything. Lesson to myself, always check the trunk.
multi split air conditioning