Here's a question for all the Commercial Real Estate agents, brokers and developers out there.  Why do commercial real estate developers always put these bumpy landscape tiles right by grocery store entrances and exits?  There must be a good reason because all the major grocery stores have these.  But they're such a pain because stuff starts falling off your cart as soon as the wheels hit these things.  If you try to go over them slowly, the cart's wheels get stuck.  If you try to go over them quickly, your cart bounces around and stuff falls off.

This may sound sexist but I'm saying it anyway... the bumpy landscape tile idea came from some guy who's never had to push a cart overflowing with groceries through the parking lot!  Just sayin'.  :)