This reminded me of a feature in windows where if you were dragging something and reached the end of the touchpad, the cursor would continue on the same trajectory as long as you kept your finger at the edge of the touchpad. Then you could overshoot a little so you could bring your fingers back to the middle to regain maneuverability. I haven't missed it since I switched to linux but now that I'm thinking about it that was a very nice touch (no pun intended).