So weird!

Sounds like it could be a drop off. I would definitely call AC, and I would talk to anyone on your road who could have seen a trailer pull into your driveway or unload on the road (if it was a drop off).

Good luck!

ETA: sounds like you solved the problem!

Hunter Princess wrote:
I do not have time for your ridiculous passive aggressiveness. Off my thread, please.
My awesomest gold star