it happened again, the problem is sometimes when im running i dont know if maybe i flick the mouse to fast, but i believe the mouse is registered as being at the edge of the screen maybe and everytime i try to move my mouse from my desktop back into that screen it "bounces" off the edge. I was able to alt tab to the window and stop from moving but i had to close the window and relog in, thankfully i didnt fall through the world.