Penny change etiquette

What's the best plan of action when you pay for something at a checkout and there's only a penny or tuppence change?

a) wave your hand, bark "keep the change" and stroll out with attitude.

b) wait patiently for it, even though you don't really want or need it.

Yesterday in Superdrug I purchased some Garnier Fructis and a Twix (together, they're heavenly) and there was only 1p change. I don't want to look like I'm trying to be flash by taking option (a), and yet the frustrations of option (b) are obvious. So I went for my Third Way, whereby I try to look busy at the checkout while they're getting the change. Taking ages to put things in a bag/rearranging them in bag etc. Then when they produce the penny I feign surprise, as if I wasn't really waiting for it and had even forgotten it was due. I know it's silly but if it works out OK it's fine. Problems arise though if they have to open a new little bag of pennies just to get one out for you, and you're waiting ages. Once you've taken the plunge of waiting for the penny you can't really suddenly decide you don't want it anymore and leave. Thus there's often an embarrassing standoff.

It can be a torment. Sometimes I deliberately pay over the odds just to make sure there's enough change to justify waiting for it, and maybe even holding out an expectant hand over the checkout. I think 5p is a good, basic amount that is generally acceptable to wait for without looking tight. I'd like to think there are others going through the same mental processes.