Arguably Kenny Dobbs is one of the best dunkers in the world (also watch him winning the Sprite Slam dunk contest 2012). He invented a couple of wicked dunkings that no one has done before. Here a couple of great videos featuring Kenny Dobbs' insane slamdunks.
Dunks: "Dubble Up Arm In Rim", "Under Both Legs Over Someone" and many more. Insane.
Dunks: "2 Ball Windmill OVER Someone" (sic!) + 360 Eastbay OVER Someone!
Collection of more crazy Kenny Dobbs dunks.