How to a tomahawk:
Dunking the ball requires a sense of urgency, but the tomahawk dunk calls for a slight hesitation in mid-flight.

Steps:
1. Dribble the ball with speed toward the basket.
2. Pick up your dribble after passing the free-throw line.
3. Take your two steps.
4. Jump off your dominant foot.
5. Hold the ball with both hands.
6. Reach toward the basket.
7. Pull the ball back toward your head by bending your elbow 90 degrees.
8. Extend the ball and your arms to the basket.
9. Slam the ball through the basket.

Tips:
You need the ability to hang in the air a bit - otherwise known as lots of vertical.
Unlike many trick dunks, the tomahawk dunk can be accomplished in a crowd.
Stretch out completely after pulling the ball toward your head.
If you can do the tomahawk dunk, feel free to tell your friends. It's an impressive move.

How to dunk 2 handed:
Although not as aesthetically pleasing as a one-handed dunk, the two-handed dunk is probably the highest percentage shot in basketball and is effective even if you are fouled.

Steps:
1. Increase your vertical leap. Just because you can dunk with one hand doesn't necessarily mean you can dunk with two. You have to jump a little higher because you need both hands above the rim.
2. Dribble the ball toward the basket with speed.
3. Pick up the ball.
4. Hold the ball firmly between both hands.
5. Jump off of one foot. Most people jump higher off one foot, but you can also jump off two feet for this dunk.
6. Extend your arms and hands toward the basket.
7. Slam the ball through the rim.

Sprewell is know for these type of dunks

L-H-M ballin at the Rucker