We have two clocks within a laboratory. We put one on the table and the other in a centrifuge made of glass so we can observe both clocks existence simultaneously. Now observe the clocks throughout the experiment. And now stop centrifuging the clock. Check the time of both clocks. My first simple question is: For how long time have the clocks been in the lab during the experiment? Suppose the stationary clock says for one hour and the spinning clock says fiftynine minutes: 1 Has the spinning clock really been only 59 minutes in the laboratory? 2 Is the experiment the twin paradox with a difference?