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:
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Source: https://xkcd.com/3276/
Ah, the nonsense we can get up to when we ignore friction and the tensile strength of materials...
We're doing physics aren't we?
Just think of the nonsense we could get up to if we made it spherical and put it in a vacuum, too!