Standing at bar. Older gentleman comments how when he gets new missed calls appearing way down the missed calls list. conversation continues. After a while comments that SMSes also appear way down the list. Eventually I jokingly comment "is your clock set wrong?" to while he replies "yes- is that what's causing it?"
Mostly I find that interesting because it seems an unbelievably obvious problem if you've grown up immersed in computers, but isn't if you have different abstractions: post doesn't stack up on your doormat in the order of the clocks in your house; it stacks up in the order that normal time flows.