We still can't get over this contestant from last week on So You Think You Can Dance. Twenty-year-old street performer Robert Muraine absolutely wowed the judges with his unbelievable flexibility and crazy body contortions. Is there such a thing as being quadruple-jointed? And for those of you not up to speed on what a 'popper' is, this video will catch you up this type of dancing that all those crazy kids are into these days.