Gerald Wallace lost because he did a safe dunk and thought he could re-do it make or miss when the rule only allowed a redo on a miss.
I know they experimented with classic dunks in the past but I think they a) took it too literally and b) didn't communicate properly to the judges.
This would be more like a classic element ie. "Reverse", "Windmill" or "Tomahawk", then everyone could tweak it with their own flavor, whether that be rotations, under the legs, raw power, hangtime, double clutch, whatever.