Person Swap Experiment

I might have noticed the last swap.

A few of those people must have noticed something, but didn't want to say anything either because they were too timid, or because they just didn't trust their memory.

Oh, they did.

You can tell....one of them discussed it with a friend.

One even mentioned it to the 2nd guy who showed up but a bunch didn't show any clear signals that they noticed and I think at least some of them (perhaps not the ones who never look up) noticed as well.

I think it is likely kind of hard to mention to someone that they are a different person.....especially when one is engrossed in a polite task.

And the colour changes are sort of hard to mention.

"You just went black!!!!!"

I suspect some factors like those in your ape intruder film are there....as I said above....the direction givers are engrossed in giving directions.

Not one person looked at the huge painting/advertisement/whatever that was being carried through the scene.... odd to me.

Wasn't it a portrait of the first guy?

Yes.

But it's pretty damn weird when you're talking to a stranger, and a huge photo of them passes you.