... at least on this site, it would appear to be one I did on a lump I got removed from my head. If you go to Google and do a search for images involving heads and lumps thereon, two on my pictures generally show up in the top ten. Depending on your search criteria, mine have shown as high as second on the list.
I think the primary reason I get so many hits from these is that out of all the pictures, mine are probably the least gross.
Anyway, I just thought that was interesting...
The pictures in question are:
The second most popular post is an attempt at humor surrounding the different types of computer users... Read it here. If you look up that in Google, I've got position number 1.