Appropriate limerick:
There lived a young man by the sea,
Who spoke only English and C,
He, when something went wrong,
Didn't hesitate long
And immediately pressed Ctrl-C.

Missed vim koan:
As a vim user :(RIP Bram):, I coulnd't pass past vim koans. However, for some reason one koan wasn't presented there. So, the last vim koan:
A pupil approached master Wd and asked:
— For many years, I followed the steps of your wisdom on the way of vim.
As far as I got it, the true way is to use a proper tool for each task?
Master Wq nodded.
— And the true wisdom is to know, which tool is right for a particuar task?
Master Wq nodded again.
— So, can you teach us, how do we know what tool is good for each task?
— In fact, it's very simple, — Master Wq answered. — To edit a remote file 
over a slow connection, use vi. Otherwise, use org mode.
— But what about vim?
Master Wq sighed.   

This is true story (names changed):
Once a pupil asked Master Im:
— I wanted to convert an image from PNG format to JPEG, using command line. I was said that it's very simple, the command is just
    convert image.png image.jpg
— That's right, — Master Im replied.
— However, when I tried this, I got an error message about invalid parameter.
— Hm, that shouldn't be so. Show me exactly which command you run.
— Here's the screenshot:
C:\MyPictures>convert girl.png girl.jpg Invalid Parameter - girl.jpg C:\MyPictures>
— Ah, I see, MS Windows... The remedy is to add magick before you command. — Lol, I am no magician, how do I add magick? — Just type magick before your command line, like this: magick convert girl.png girl.jpg This time the command run smoothly, and the image was convreted. The pupil, however, went confused.
Why it was so? MS Windows has a program unwisely called `convert`, to convert FAT filesystem to NTFS, and also adds system PATH before user's PATH, so it conflict with `convert` of ImageMagick, so (since version 7, I believe) ImageMagick added (I guess, after GraphicsMagick) a program called magick with commands `convert`, `mogrify` etc as its first argument.