I disagree, you tried to give me a roundhouse kick in the neck, so you'd have to lift your leg pretty high up, and i'd easily be able to see it since my face is in stomach height, so i don't even need to turn my head too see your leg moving. I duck down to avoid your kick, meaning that your kick continues, you said you lowered your foot after the kick, but since the kick didn't make contact, you'd have to stop the kick in mid air to continue your move, and that would be hard when i've just headbutted you in the crotch. That's also why i grap your leg by spinning 180 around, because i'd guess that you'd try to kick me in the back, which would also be pretty hard when i've just headbutted your crotch.
Hope this makes sense O__O.