Like most tech firms, my employer makes you scan your ID card whenever you enter a building. When someone with no ID card tries to follow someone else through a door, they call it "tailgating." I've always thought that a poor metaphor. It's more like "drafting."
The other day, I couldn't find my ID, and I stood at the door and did the Keycard Patdown of all my pockets. I shan't be posting a video, but trust that this is the lily-whitest of all dances. A stranger held the door as he patiently watched a dork swat himself, and we shared a knowing look.
"Who on earth would go in there who didn't have to be there?" I sighed.
"Now I know you work here," he replied, gesturing for me to walk through.