Cory from Boing Boing said it better than I can:
"Horrifying and fascinating six-legged insectoid Finnish logging machine with the power to stop a thousand Loraxes without straining its thoraxes. Don't miss the videos."
Update, 2013: For posterity, here's the video:
I know what I'm asking Santa for Christmas this year.
I think you just found our next flyer art! :) :)