Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to windmill dunk [title] Jump in the air. [step] Like all dunks, a windmill requires you to jump high. Start a windmill dunk by approaching the basket while dribbling, then jump toward it as high as you can.

Ending1: Make sure your knees are bent, and you are not rolling by arching your back or tilting your head to make contact with the basket. [substeps] You can also actually do a bounce dunk with your arms straight up. Ending2: Your momentum may have carried you over once you jump, but the windmill dunk will remove that. [title] Reach the basket after you've jumped. Ending3: For beginners, this will only take a few seconds to get up close to the basket. [title] Make a fast punch with your hands as you jump. Ending4: [title] Hold onto the ball with one hand. [step] One of the distinctive features of a windmill dunk is that it is executed with one hand.

Answer format: ending1/ending2/ending3/ending4