Great cardio circuit with or without the treadmill running portion! You could also put these in between other body weight exercises to keep your heart rate up during HIIT (not that you necessarily need more cardio for that!
Start curling: Place the flat iron about of the way up the strand. Close the flat iron and twist it away from your face one time, then pull it slowly down the rest of the hair strand while it's still clamped shut. I love flat iron curling