ON THE ULTIMATE GUIDE TO CATHE'S VIDEOS UNDER INTERVAL CARDIO IT LISTS IMAX, IMAX 2 AND IMAX 3. IVE LOOKED ALL OVER FOR IMAX AND CANNOT FIND IT. WHAT VIDEO ARE THEY REFERRING TO? I HAVE IMAX2,IMAX3 AMD TERMINATOR WITH IMAX EXTREME, IS IMAX EXTREME WHAT REFERRING TO?