wow, what a sensation. i felt hungry at the 5 km mark but rather than stop at home for fuel, i decided to gut it out. at the 15 km mark, i felt all energy drain from all of my moving muscles within the span of about 10 steps. i've never felt the energy train leave the station so quickly. i really had to gut out the last 4 km's feeling like led. i also had to start this one at almost 8 pm, which is never a good feeling. on the bright side, i was able to run after sundown in shorts and a t-shirt and not only is my route completely melted, i can smell the earth.