A guy in the audience yelled at one of the tennis players at Wimbledon, so she decided to let him see how hard a professional serve is delivered. He was well-served indeed!
I love how, at 0:59 Kim Clijsters has to lie down, she’s laughing so hard. Good sports, all around.
One of the things most people never get to experience is going up against a world class player at a sport. It can be stunning, literally incomprehensible. It appears to me that Clijsters hit her serve so it bounced off the guy’s racquet before he had a chance to move. She was actually being very kind and funny. That’s a real professional for you.