During the fight, the boxer swiped the air furiously, but could not hit his opponent.　　"How am I doing?" he asked the coach at the end of the round.

　　"Well, if you keep this up," replied the coach, "he might feel the wind and catch a cold."

Great coach! He knows how to inspire his boxer well

should of throw him some virus, that will make him catch the cold faster...

someone catches a cold or let the cold catches someone...