This is a neat time lapse of the conversion of Wrigley into a hockey arena.
NHL Network Online: Rink Build Time Lapse - Updated thru 12/22

And here is what happens when baseball dudes run a zamboni:
[ame=http://www.youtube.com/watch?v=eZAgccYTjvE]YouTube - Zamboni Falls off Truck at Wrigley Field for the Winter Classic[/ame]