ive had a moment or two that felt something like the grocery store scene from zombieland. you are walking through the grocery store and there's some guy center of the isle starring at something. You say "Excuse me..." Guy looks up slowly and then grunts... Moves 1/2" to one side and goes back to starring at whatever it was. "Excuse me man, I don't wan to bump you!" Grunt, moan and moves just enough to make it uncomfortable to pass.

feels very much like a zombie encounter.