Acrobatics are always impressive when seen, but a video circulating Facebook has an extreme example of it featuring a trio of teenagers, The Ross Sisters, who put on an incredible show in a movie from the 1940s, “Broadway Rhythm.”

They start off by singing a song oddly called “Solid Potato Salad,” singing and dancing a bit awkwardly, but what is really interesting is the acrobatics that follow.

This was to be the peak of their career; they performed around the country in the 1940s as teens and young adults, but moved on with their lives before long.