There's a speedbump that I always avoid when I have a full lunch crew in the car. I'm always guaranteed to bottom out each time. My car is lowered from the factory (yeah, BMW, sport package), but my friend that drives a Toyota Camry bottoms out on the same bump! All I can say is just try to avoid it altogether and you should be fine. In my case, I have to avoid that particular entrance to the parking lot. There's really nothing you can do about it.