In reply to Fraser:
I think the clip linked to rule 90 is hilarious, mainly for the music:
Rule 90 Never Get Out of the Big Chain Ring
If it gets steeper, just push harder on the pedals. When pressed on the matter, the Apostle Johan Museeuw simply replied, “Yes, why would you slow down?” It is, of course, acceptable to momentarily shift into the inner ring when scaling the 20% ramps of the Kapelmuur.