When looking around in game the view will continue to rotate, slowing to a stop

This has happened to me in both singleplayer and multiplayer, and I have an unmodified client. The view will continue to move in the direction I was looking, even when I stop the mouse. This has also occurred when using the touch pad, so I'm fairly certain its not a problem with my mouse. Since it involves motion I cannot attach a screenshot, but the way the view continues to move is similar to that of Optifine when zoomed in (No I do not have it installed).

I'm not entirely sure how to reproduce this bug, as it seems to occur at random. I will try to look for a cause, but so far I've been unable to find out why this is happening.
Thanks for any input ~Nuclear