LMAO ...
sanji stopped the kick!
Sanji is kicking and King of blocking Sanji's attack. Sanji's leg is full extended from his body and he is leading with his heel. That is a kicking stands.
King was the one with his knee up toward his stomach so he is blocking stands.
In the next scene King just extended his leg out.
It does look like Sanji might have turned invisible right before King crash into the building.
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When Page One is stronger than King
P1 attacked Sanji. King moved towards Momo and Sanji attacked King who was able to react to and block invisible RS Sanji.
Oda draws P1 moving in to attack Sanji before they clashed.