An Historical Breaking Point Oft Forgotten

Ever wondered what kind of parking lot shopping cart free-for-all inspired that very first bleeding edge grocery store to sacrifice a precious medium-good parking spot in favor of a mid-lot cart return?

 I have.

 And I'm sorry I missed it. Tears. Screams. Riots. Blaring horns. Daring escapes. Wow. I bet someone has home video footage somewhere.