Fry your abs without the spine-wrecking, neck-jerking stress of traditional crunches -- using this radical sit-up designed by the world's leading back and muscle function expert, Professor Janda from Czechoslovakia. No one -- but no one -- has ever matched Bruce Lee's ripped-beyond-belief abs. What was his favourite exercise? Here it is. Now you can rip your own abs to eye-popping shreds and reclassify yourself as superhuman.