TIFU by closing the trunk..

We went to buy some groceries last night. When we got home, we took all the bags out of the trunk. She grabbed the last bag and looked ready to head in. There was a car idling behind some of the parking stall spaces the entire time with the lights on. Curious, I looked over at them as I closed the trunk.

I heard a thump followed by her crying. While I was looking away she went back into the trunk for something.. Nailed her right in the head with it.

Since then, in addition to the splitting headache she's had, she has reported feeling nauesous. I worry that she may have a concussion and I feel absolutely terrible about this :(