Unfortunately, a ball boy experienced that excruciating pain firsthand during a second-round match between Feliciano Lopez and Adrian Mannarino at the Australian Open.
Lopez unleashed a 200 km/h serve that drilled the ball boy, who had his arms behind his back, directly in the groin.
The poor kid tried to carry on. Lopez and Mannarino even came over to offer words of encouragement.
But the boy eventually was forced to leave the court.
We couldn't resist showing this classic from Homer Simpson.