This innocent looking tea towel

This innocent looking tea towel was used as an instrument of torture tonight and it's not in the way you're all thinking. apparently Madonna uses a tea towel to tone her arms (I doubt she actually owns a tea towel). It's used as resistance by pulling on each end and the instructor can tell if you're cheating and slacking off!

Much like some of this workout
http://m.youtube.com/watch?v=4zm3wTMzpQg