Treadmill

For the last 2 weeks I've been walking the track at the Y. This morning I decided to try treadmill for the first time (in my life). I had fun playing with the speed and incline. I enjoyed the data it provided me. I even watching a show on Netflix during my 2 mile, 4mph, 2.5 incline walk. Overall, I liked it, but after I got off I felt really disoriented while walking to my car. Does that always happen?