Tae Kwon Do?

I am a TKD guy learning Muay Thai.. I am 6ft, and my sparring partner in my MT cl is 6 4.. and he dropped an ax kick on top of my head (like he was saying .. "i can kick too") I would say it is a bad kick to use with any frequency (please dont rely on it.. people will just kick your grounded leg out from under you) but it is more of a "show mw something kick"... and even though it is against the "rules" it leaves all kinds of areas exposed for far too long.... even a common street thug could talckle you underneathe it... if you really want to apply the practicle application of TKD (and yes it is a good style.... to all you ignorant haters)... join a Muay Thia gym.... let it fly and you will find out really quick... what can work... and what has very little chance of working.... good luck