Float around Chicago's magnet ground wearing your magnet shoes

Unlikelymoose's blog post about "magnet shoes" inspired the following thought:

What if the ground of downtown Chicago was made of positively charged magnets, and you wore positively charged magnet shoes? You'd be bouncing all over the place!

Ok, so that won't happen where all the ground in downtown has that. But it would be cool if they took a 20-foot by 20-foot area in Pioneer Court (outside Tribune Tower) and made that into a polarity magnet. It would be like a jungle gym downtown! But i guess if anyone walks over this area, you'd have your cell phone screwed, laptop toasted, and credit cards scorched. It would be the SQUARE OF DESTRUCTION! or the WIPEOUT SQUARE.

And if they made the magnets in this square like, REALLY strong, then it could attract loose metal and stuff, like in the movies. What if it was so strong, that people couldn't help but be sucked in by it as they walked by? The window by my desk at work looks down on Pioneer Court, and I would find this endlessly amusing. It would be even more amusing if I had the power to turn the square on and off.