The village supermarket always joked about gifting a price for the one millionth customer, advertising it on a sign. They even had a volunteer clicking in each customer, a good joke and good work experience for the kids.
Thanks to time, forgetting they had a volunteer, and the introduction of a road running through, the one millionth customer entered, and the volunteer screamed, driven to a frenzy through excitement, tackling the customer to the ground so they’d know. The staff just stared in half bewilderment/half panic.
A broken leg, 10% off their next visit, and a lawsuit.