I’m sure it was a moment of epiphany. Person in charge of an MRI takes avantage of an idle moment in the parade of patients to have lunch. Pulls a banana out of a brown paper bag. Looks at banana. Looks at MRI. Looks at banana. Looks at MRI. And the rest is history.
Give it time to load, and if you’ve got a slow connection, you might not want to bother; these are all animated images of 2-D slices scanned through MRIs of fruit and vegetables. The artichoke is my favorite.