Unfortunately I only have 20 hours to learn C.

Just skip the introduction part

You must be older than you look, to remember that Dale Arden line...

I'm older than C.

But you can listen to a Queen's best of album at any age.

Freddie Mercury's voice survives.

From the HN guidelines:

Please don't comment about the voting on comments. It never does any good, and it makes boring reading.

Any comment that doesn't add to the discussion needs to be downvoted (Yes, I know the irony of me posting this comment).

Because someone has to keep this place from becoming Reddit?

When you say this is a reverse image search, does it search over multiple images to find the one which matches the closest? In the demo it seems to only search over a single image to find the cropped, stretched or rotated part of the image. Do you also have examples of negative searches where it doesn't find the image in question?