This thread makes me miss the days when I would hit a short hill at speed, stand up and sprint to the top... this is something that lighter riders have an easier time with as you are moving less mass up the hill.

Used to lay down enough torque to bend some good quality parts this way and bring up the point that some bikes are more flexible than others and standing and hammering can cause enough frame flex to throw off the shifting and unexpected gear changes when you are laying it down can be really unpleasant.

If your cables are routed under the bottom bracket ghost shifting under high torque loads is more likely to happen... for this reason I always preferred really stiff frames.