What a coincidence, I was coming up a short hill today from a boat ramp where I rode down to use the bathroom. Usually I'll shift to a lower gear when going down, but today I forgot. I just thought I'd gut it out in the higher gear, and stood up for the last third of the hill. I was riding the LHT, and checked my leg and knee position while pedaling standing. I was also surprised how close my knees were to the bars. I didn't have any problems, and had never paid any attention to it in the past.