Ah the self checkout. Keeps me quick and nimble. Want to retain the skills from my old grocery working days back in the 80s. You never know when you need that skill. The bag person went on break? I'll save you, Miss.
In my early 20's I would pull out the large folded paper bag with one hand, snap it, toss it in the air with a half spin and it would drop into the other open bag. Spin the stapler in my hand like a 6-shooter. Kids would look at their moms. Did you see that? Plastic later took the fun away.
Self checkouts don't trigger me, especially when I don't have a full cart. In and out quickly; I'll go straight to the smaller or non existent line.