When a promotional tube of seasonally flavoured crisps found its way to the Guardian newsdesk it wasn't long before many editors experienced what they termed "mint-choc-face". After one described it as the weirdest thing he'd ever put in their mouth and others agreed, we decided to test this theory by sending a video crew out to see what the public thought. It's fair to say that the crisps - mint choc flavoured Pringles - met with bafflement on the streets of London, and caused some amazing expressions