Minecraft Forums

So when I play minecraft, and hold in a key (such as a moving key) and start swinging at someone (Pvping) My mouse starts to glide around as if I was in cinematic mode. But I'm not. Also if I swing and move around long enough, My person will continue moving and swinging even after I take my hands off the keyboard. Why is this? I really need help. Also, this is not fps lag as my PC is very good and runs this game at 300+ fps