Popsugar Health & Fitness Gymnastics Riley McCusker This Is Halloween Gymnastics Floor Routine This Gymnast Did a Floor Routine Set to "This Is Halloween," and, Yes, It's Iconic 20 August 2018 by Victoria Messina View On One Page Photo 1 of 13 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Riley's Floor Routine Previous Next Start Slideshow GymnasticsWorkouts