I got a funny story about trailers hitting your Jeep.
About 4 years ago, I borrowed my cousins ATV trailer (little 6'x9' with fold up ramp to get some hay for the horse we had at the time. When I was done I unloaded the trailer on our driveway as my cousin wasn't home to put it back in his garage. I parked my XJ and went inside. Well about 2 hours later a bad wind storm was blowing in, and hard. I looked out my bedroom window just in time to see the wind pushing the trailer towards the XJ.
Before I could get out the front door it slammed into the side of the XJ giving it a nice vertical dent in the middle of the drivers door.