I’ve seen it many times, and also these classics:

• Elderly couples entering the store with a shopping cart, then stopping immediately behind the entrance - “Oh, won’t you look at all this stuff in here? Now what do we need again?”, completely oblivious to the queue forming behind them.
• Old people standing in the middle of aisle intersections with their shopping carts like statues, just… pondering.
• Old people very slowly paying with coins at the checkout, like one cent at a time.

Nice. Thank you. Even better, it’s a free study.
But instead of showing the coefficient of the model they derived, I would have shown figures 1 & 2 which are riveting to me.