Checkout: Thats $5.
35 thanks
Person: brings out change
Checkout:
5c 5c 5c 5c 5c 5c 5c 5c... hold on..5c..
10c..15c..20c *1 minute passes
Person: Sorry about the coinage
Checkout: Thanks, and
stuffs the rest into the till
Checkout later finds that the till is down on money