Went to the local HD yesterday to pick up a bunch of sandpaper and a few
5/16" and 3/8" bolts I needed. Found what I wanted and decided to speed
things up by going to the self-checkout line. Bad move.

The sandpaper scanned fine, but I was at a loss how to deal with the bolts.
4 @ $0.13 and 4 @ $.14, IIRC. No bar code, no obvious way to enter them
into the system. I futzed around a bit while several sales droid types
hung out and observed the chaos.

Eventually, I found a screen that said something like "press here to summon
help", which I did. Still no assistance from the droids was forthcomming.
Finally, in desperation, I just dropped the bolts into my bag, which
immediately generated a message that the weight of my bag didn't match what
I had scanned, and that I should remove the extra items from the bag.
Still no assistance-droids.

Some more futzing, and the machine prompted me to swipe my credit card. A
droid came over, helpfully showed me how to swipe it, and watched me
complete the transaction.

Sigh. I walked out the door with my $11 or so worth of paid-for sandpaper,
plus (by my calculations), $1.08 worth of hex-head bolts, shamelessly
absconded with. What's a customer to do?