Cziffra's live heroic octaves clock in at around 25 seconds I think, very fast. Valentina Lisitsa's octaves in the same passage were very impressive.
Horowitz rach 3, from the vivace/cadenza 3rd mvt. those left hand octaves wow aslo LangLang playing the end of Hungarian rhasody 2. I showed the vid to one of my friends who said "F***, that's like the slam dunk contest of piano"
I wonder what pace Smetana played it in. I doubt that he played it very fast.
uematsu octaves, from 0'01 to 0'03https://s33.yousendit.com/d.aspx?id=2D4X6E58EMQ3K1EYNI7D5Y3HJ0
and here, uematsu's ziff bee excerpthttps://s7.yousendit.com/d.aspx?id=3GIL2780IP47A1HNHXJYF98PDQ
That Umat ziffs... Is it just me or is that truly impossible... Either that or it is a piece for 4 hands? The human body just isn't that quick.