Snow day
When I was growing up in Minnesota we had winter, sometimes we had too much of it. If we received too much snow there would be a snow day and school was closed. Over a cup of coffee we were comparing winter stories when I found out there is something that trumps a snow day, a coal week. It seems that during the winters in Slovakia sometimes there would be problems in procuring the necessary heating coal due to temporary budget problems.
In those cases the school would be closed for a few days or a week.
The truth will set you free
You left the meeting early, why?
It was boring.
What did you do then?
Read some Android documentation.
Non-monetary opportunity costs
For instance, an individual could choose not to ask a girl out on a date, in an attempt to make her more interested (“playing hard to get”), but the opportunity cost could be that they get ignored – which could result in other opportunities being lost.
From wikipedia