Well, Günter Hagedorn - a friend of mine - just showed me a cool trick in Photoshop: Cross-Processing pictures. "Cross-processing is developing color print or slide film in the wrong chemicals". Have a look at the following two pictures as an example. The left picture is the raw output from my camera. The right one is the one Günter cross-processed.
|raw picture||cross processed picture|
Pretty neat, eh?