Playing around I selected follow on someone, but as soon as it popped up that it was waiting for confirmation from them, I hit cancel. After that, they must have confirmed because I started following them. If they stood still, I could run and jump and move, but if they walked or jumped away I was drug along with them (Sometimes backwards.)
Clicking on them did not give the option for unfollow. It did however, still have the follow option which I selected, and then I was able to unfollow them.