No undo for the dock?!?


Has anyone accidentally dropped a huge group of something into the dock?

I was happily pulling my images to the Preview application when I missed and let go... to my horror all the images.. about 20 of them fell into the doc and quickly filled it. I was quite angry to realize I couldn't command-Z such an annoying mistake... I think I should be able to!... seeing how I can Undo other boo boo's on the desktop.
This is a feature that needs to be added. We should submit feedback to Apple about this.