Bob Harper's Inside Out Method - Core Challenge

Bob Harper has some great exercises on You Tube under his "inside out method's".. This one had me cluching my stomach and doubling over just watching it!! Especially as it got up to the 3min mark!! OUCH!!
And I thought we had it bad at the end of a step or pump class - HUH!! Yeah - right!! That is NOTHING!!

Watch the clip and give it a go!! Hehehehe...