I thought the bit where they measured the fitness of 3 of them ... and that it was the youngest, slimest that was doing fairly bad was interesting - They then did a MRI scan and showed that although thin he was carrying quite a bit of fat, and that one man who had been classed obese was a lot fitter than him and when scanned turned out he was carrying quite a bit of muscle... They then missed pointing out that BMI doesn't work so well for those with muscle but it was interesting to see it shown in a scan.