He went right back to it and got in position behind it with his back legs as the ones to grab and push the ball and his front legs to do the walking forward (although he is actually moving backwards).
So there you have it--a day in the life of a dung beetle. Not the most glamorous of jobs, but he does it quickly and well. I liked watching as I found it very interesting and quite fascinating (and one of those things that you just can't make yourself look away from).
Here's a little closer look at him (he was really moving fast) and you can see how he is grabbing with his back legs as his beetle head is near the ground and he is using his front legs to move forward.