Bare Lee - Interesting thoughts. Ok. Forgive me here, but I might just take off on a tangent with this subject. I have little self control ;-) I think the last category could also be summed up as the 20x category (although this is a number and I truly believe it could be anything for anybody in an emergency situation or even when you want it bad enough). It's the theory that you are capable of 20 times more than you can actually do. Its about belief. I've been struggling with this lately and have been having to make some changes in my mental attitude to adjust for this with my upcoming race. Check out this video: I surprise myself sometimes, but usually when I don't think too much about something first. I don't count the weights on the bar anymore and when I run I run from aid station to aid station and try not to think about cumulative miles left. Sometimes I have to believe there's this invisible well of strength. Sometimes I can tap into it. Sometimes I can't. I'm getting better, but if there's one thing I've learned with all my training is that you can't do sh*t if you don't believe. That's not to say we don't have physical boundaries. We do. But we can surpass those and we should recognize the we don't really KNOW what our true capabilities are just like we really don't KNOW what's beyond the universe or what happens after death. That "not knowing" shouldn't limit us though. That "not knowing" can be the catalyst for so much potential in all of us. I'm so done with limiting my body with my mind. I'm ready to release myself and start to explore my potential beyond what I think my body is capable of. But for that I have to believe.