Unless you have ambulances meeting the airplane, most turbulence is only a few feet. It's like going over a pump at 5 MPH or 500. The faster you go the more violent it is going to feel. Airplanes slow down if they get in bad turbulence. In all but sever turbulence, you can hand fly the aircraft and keep it within 100 feet of the assigned altitude. You would know if it was sever because there will be injuries and damage in the cabin.