Well i do an untraditional style of TSD. We don't teach a "side snap kick" as part of the curriculum, but we do teach the sidekick. is it the same thing? i notice that we call round house kicks round kicks in our school so i was wondering if it may be the same kind of thing. i did look at a few videos of side snap kicks online and a few examples look exactly like a side kick. if a side snap kick is in fact just a side kick, in TSD we do teach them and use them as a large part of our fighting. in fact we have a few drills that r devoted only to learning side kicking strategies.