There may be one or two "danger" situations such as highland dancing competitions when one is higher up on the stage and jumping up and down and twirling with much more vigour than usual that might provide a split second posterial view
Highland dancers don't twirl and they don't jump up and down. You will not find those words in our textbooks. They are also required to wear an undergarment that is black or tones with the kilt. No white.