Airports...
are a great place to spot BSODs, "Windows not activated" messages and pop-ups blocking customer messages. Manchester's baggage carousel screens always seem to be plagued with problems, as do Helsinki's many screens. Actually Manchester Airport's entire computer systems seem to be problematic - I and the rest of the passengers on my flight got locked in a baggage collection room for about an hour as the staff couldn't get us out because they couldn't work out how to override the computerised door controls!