Pictured above: a Dock with the magnification feature turned on. This feature, which makes Dock icons squirm as you move your mouse over them, is absolutely adored by some people, but not by me, because a squirming target is harder to click on.
Tonight, for some reason, I thought it would be fun to experiment with the Dock (which was better in OS X 10.5 than it is in 10.6), and I found an interesting shortcut: if you hold the Control and Shift keys you will temporarily switch the Dock's magnification feature ON if it's set to be off, and OFF if it's set to be on.
Armed with this knowledge, you're now able to very gracefully and surreptitiously and temporarily turn the Dock magnification feature off when you use Macs with Dock magnification set to "on." This will be especially useful for those of you who make a living helping others with their Macs, double-especially if the Dock magnification "feature" drives you nuts. Oh wait, that's me. Never mind.
