eric william carroll spent a year rescuing snapshots from one-hour-photo dumpsters and then drilling 35mm holes in them. there's some pretty interesting self-reflection on the medium going on in this work (hence the title punctum from barthes' camera lucida). see more of his work here.
[all eric william carroll. from the series punctum/one year of taking pictures. 2006. top to bottom: untitled (gun). untitled (after sugimoto). untitled (baby).]