Here's the well-known "four faces" error, in which the leftmost boy's
face appears in the girl's body on the right:
It's considered by most to be a counterclash error, although the
presence of accessory design elements on the highest points of the
design gives one pause. Counterclashes are almost always confined to
Whatever it is, I think it's a pretty cool error. It's apparently
quite abundant. I think I have five or six of them.