I fell asleep at the wheel once driving from ny to Florida. The shoulder bumps woke me up thankfully. But I ended up swerving across all of the lanes on the highway, recorrected it so that I then went across the lanes again, went down into the grassy shoulder and settled the car there. My hands were shaking but I kept my cool thankfully because I consider myself a good driver. Sleep caught up to me then, and since I will never underestimate the power of the body wanting to sleep when it needs it. There were also no cars around thankfully which was amazing considering it was 2pm in the afternoon. Could have been a nascar kind of accident.