I really love work thats made indirectly by the artist.  Pieces that are left to chance and vulnerability.  This pinball machine creates drawings while you play.  The ball being the pen in this case and the artist being the player.  Sam Van Doorn, the artist behind this chance-inspired piece, is a graphic designer.  You can view more of his work on his website here.  this work reminds me of Eske Rex’s work also— click here to see his chance inspired pieces.