Xkcd had a game where you pick the two weirdest items to bring to the checkout of a store. The alt text had the winner being a pregnancy test and a wire hanger.
Once I was going camping, around the same time I started rebuilding the transmission for my mom's car and I needed supplies for both.
I ended up buying:
rubber gloves,
rope,
a survival knife,
ether (a.k.a. carb cleaner),
huge box of paper towels,
a tarp,
heavy duty soap,
bailing wire,
screwdrivers,
camping stove and propane,
concrete stain remover,
a hamburger grinder,
and an ax.
The 3rd season of Dexter was on sale at the time, but I'm pretty sure the cops would've been called if they saw that at the checkout counter.