High camp theatre
A couple of weeks ago I was passing through Heathrow's Outer Circle of security hell when the arch went 'bing'. A very polite officer said would I be prepared to be patted down. I said yes. After a good rummage he said he wasn't sure why the machine was going 'ping' so would I accept a body scan.
In the interests of novelty I said yes, so I was taken through to the pervatron. En route I found a couple of things, including a pack of gum and a pack of wet wipes tucked into a pocket and passed them to the security guy. He put them on the table without examining them further, irradiated my produce section and said I was free to go.
But the two objects I took out of my pocket that might have triggered the arch were never rescanned.