I don't know if you've noticed, but each SO "Trilogy" site's 404 (Page Not Found Error) has its own on-topic amusing image. This site currently has the boring "PAGE NOT FOUND :(" that every beta SE site has (check it out if you don't believe me).
So, following the lead of other betas, I'm starting this question to gather ideas for amusing 404 Page Not Found images.
To clarify exactly what we're looking for, here's a quote showing what Jeff was originally looking for when he asked for ideas on the SO trilogy sites:
By on topic, I mean the 404 image on Stack Overflow should be a programmery "not found" of some kind, and the Super User one should be a power user's "not found", and so forth.
So a photography-related "problem" or inside joke for this site would be funny...
More from Jeff (my edit in [brackets]):
These images would be shown in addition to the existing 404 page text, so nothing is getting lost, we're just trying to inject a little fun into the process.
I'm having trouble coming up with anything. Any good suggestions? Post them as answers!
If your submission or suggestion is highly voted and meets the criteria outlined, it's likely to be deployed as the "official" 404 image for [this site] …
Please post the image AND quote the source so the dev team can negotiate rights if necessary.