This technique is ued by Enyou with his Sledgehammer.
Rank C
Taijutsu
By stepping forward a few steps, while spinning around. He is swinging his hammer like a golf club twice in the same motion. While doing this dancing steps, he is loading power to the hammer.
In the second swing he hits the target from below. Causing good damage to the target and making it to fly really high in the air.