The coach noticed that Caleb really started to kick the soccer ball with great amount of power after the kicking drills. Caleb adjusted the power of his soccer kick by
increasing the speed of his kicking leg prior to and upon contact with the ball
starting his kick from a two legged standing position prior to contact with the ball
stopping his motion upon contact to create more of a rebound effect <-(I think its this one)
turning his foot and using the inside of his foot and ankle to strike the ball