Has anyone noticed that the hammer-on/pull-off section of Brouwer's 20th etude is contained within Cuban Landscape with Rain? I was just listening to LAGQ's performance of the piece and realized it. In their performance it occurs at 4:11, can't say for other performances. It sounds really cool with four players playing it. (Perhaps each sticking to one of the subsections?)
This is really awesome to me because I *always* thought of that section of the 20th as being like flowing water, specifically river rapids, but he used it as a thunderstorm.