#24: The cabin air in an airliner is purged and refreshed every few minutes (I can't recall the exact requirement for certification). It is not recycled.

...evidence of drug use, blood stains and broken glass and said that a newly fitted sink had been smashed

...or, as I call it around my house, "Tuesday night".

Super collider thingymajigs like this give me the creeps. They will be the end of us all.

Alien zipping along in a spacecraft: "Zorg, what was that bright flash?"

Zorg: "I don't know. I think it came from where that planet used to be..."

A toilet tank lid would do about the same thing.