I tend to think so. For example, if you miss with a roundhouse kick, if your opponent then moves in on you, a spinning back kick will have a good chance of catching him off guard. I have seen some videos on you tube where a spinning technique lands after the person's opponent launched an attack first. One was a tae kwon do guy landing a 360 degree kick on a guy after he threw a punch at him in on olympic competiton. Otherwise, I tend to think they are too risky, even though once in awhile somebody will win a fight by immediately throwing a spinning kick. What are your thoughts about this? Thanks in advance.