Why is this corridor in Inferno called "Banana"?

I was watching a recent replay of a CS:GO match. For some reason the casters kept talking about a team "keeping great control of banana". For example at around 19:04 in this ESL video. At first I thought I misheard, but then I checked various maps online, including this one:

And for sure, there it is: "BANANA".

All of the other callouts / names on this map make sense somehow. Is there some inside CS:GO joke that I'm missing here?

Why is it called "Banana"?

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2 Answers

The wall texture on the original Inferno (1.1/1.3) was yellow and the shape of the path was a banana.

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Because it's curved like a banana.

(Some people online say it's because there's a yellow car, but this is incorrect - the same stretch was called 'banana' in CS 1.6, and there was no car on the map back then)