In Muay Thai, when an opponent delivers a roundhouse kick to your head, what options are available as a defense or counter measure?
I have seen blocking it with the arm on the side of the head in the path of the kick, blocking with the kick facing arm and a reinforcement from the arm on the opposite side as well, and I have seen the technique of leaning back. Are there any other techniques? Can the leg be grabbed for a possible sweep? Is it advisable to move into the kick instead?