Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to dive off a starting block [title] Step carefully onto the starting block. [step] You will be facing the pool, with both of your feet facing forward. Quickly assess and acquaint yourself with the feel of the block.

Ending1: It should feel like something to hold on to. [substeps] Take care not to over-plant your feet on the edge of the block. Ending2: Make sure you feel completely steady before continuing. [title] Place one foot in front of the other. Ending3: Continue to evaluate and test yourself and the posture of your feet as you step over the edge to land. Make sure you stand perfectly still as you enter the open air. Ending4: Be sure that you are in the correct stance. [title] Raise your arms above your head as high as you can (you can do this while standing on your hands and feet).

Answer format: ending1/ending2/ending3/ending4