I got a package in the mail that was sealed in a LP sized envelope. I was swinging the envelope by my side when I heard a semi-loud "whack." Theo quickly scampered away. He had been walking by my side and the envelope must have nailed him in the head.
My bad. It must not have hurt too badly because he quickly hopped up on the kitchen table where I open my mail and where the routine is for him to get his forehead scratched. Sorry buddy.