Alley Oop to yourself: Hold LT + Y on a fast break
Cockback: Hold LT + X
One Handed: Hold LT and tap X
One Handed Windmill: Hold LT + A
Lay Up: Hold LT + B
Various dunks: Hold LT and tap Y
Leaning Tomahawk: Hold LT and tap A
Two Handed Tomahawk: Hold LT and tap B
Two Handed Windmill: Hold LT + Y