Okay, I've got one.
I don't know if you want to put further specs on the fullsize image, but I think that would be nice. You may even want to leave the caption only for the fullsize image. Furthermore, my thumbnail is pretty hard to tell anything from (but I had to follow the 75px width restriction).
Game: CastleVania 3
Platform: NES
Emulator: FCE Ultra (FreeBSD)
Caption: "Trevor, leave this beast to me."
Meh, that is greatly shortened from what I wanted, and is still 31 characters.
Caption: "This mirror is broken."
That is only 18 characters if you don't count spaces. If spaces count...I'll have my work cut out for me.
Edit: It looks like working on the caption allowed Sprung to beat me to the punch.
