I marvel at this...

[Danneaux]

Hi All!

This boggles my mind...how is it possible to ride up steps so fluidly *without* pedaling and seemingly without losing momentum?

https://www.facebook.com/sportshutter.terrismith/videos/472987622881176/

It seems to be a matter of endless bunny-hopping called "pump-hopping"...
https://www.youtube.com/watch?v=o0oGMix5X44
Doesn't always seem to come off, but when it does, it is a thing of beauty, as this clip with slo-mo footage shows:
https://www.youtube.com/watch?v=jmXK9RlWkHI
https://www.youtube.com/watch?v=jyzpQ5q1AFk

Best,

Dan.

[JimK]

another example: https://www.youtube.com/watch?v=fofuwA2iOfE

I think the principle is basically the same as pumping when on a swing. Have you ever tried the standing method outlined here: http://www.besslerwheel.com/wwwboard/messages/435.html - you can get a swing going really scary intense that way!