I know what you're going to do with that!

I was in the supermarket tonight. It was a pretty quiet affair, and whilst choosing toilet roll I noticed there was a woman also deliberating over her choice of bum wipe. I smiled, the way that you do when you're in someone's way and are happy for them to go first. She made her choice and I gesticulated with my eyes to her selection in that way that says "I know what you're going to do with that!". She averted my eyes and moved swiftly away. Now I think about it, she was a bit rude really.