xkcd #3276: Recursive Trucker's Hitch
Title text:
As if the americium smoke detector incident wasn't enough, now nuclear regulators have ANOTHER reason to worry about the Boy Scouts.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3276/
Just think of the nonsense we could get up to if we made it spherical and put it in a vacuum, too!