Thwack!

A ping-pong ball is hit by players from one end of the table to another. It often travels at high speeds, coming in contact with racquets, the table and sometimes, the floor. On occasion, it perches precariously on the net, before falling to one side. It is also not uncommon to find the ball spinning, thus changing trajectory after impact. This continues for the duration of several games, without abatement.

And that is how one feels after a week at work.