I've accidentally wandered onto a film set before. When it's in a public space it's not always obvious what's going on or that you shouldn't be there. I had no idea why a generally quite busy part of town was almost entirely devoid of traffic that day. There were no clear signs or ways for me to know what was going on until I talked to a random guy and he told me.
Perhaps your ability to detect and understand context is simply vastly superior to mine.
Perhaps your ability to detect and understand context is simply vastly superior to mine.