Go at night or weekends, if it's in use you're very very likely to hit a car. Skate them all one night and find out where the security guards are at. Find one with an elevator! Then even if security is after you, you can skate a few floors, ride the elevator/stairs up a few stories and get behind the descending guards that THINK they're on your tail! I don't always ride to the bottom, I change it up. They can't figure it out bahahaha!!!!!!!