Nalbandian rage kicking
Matchpointovic, Janko's 3rd set vs Ferrer and his year-long stay in the top10, Rosol, Olderer's return to #1 to break the record, the wind, Novak not winning the Olympic gold (and Annie winning it) and the year where many good players retired (Gonzo, Ljubo, Roddick, Ferrero...). Maybe I'll remember Thugbandian's outburst.
Above all else, definitely this. It really was a Kodak moment.