When the team went on an offsite morale event jet skiing, he was told by the proprietor that he couldn't participate because their policy requires you to be at least 16 years old. He was 27 at the time. He never lived that down with his peers. When he tries to go to a bar with friends, he's sometimes accused of trying to pass off a fake ID. These experiences are deeply embarrassing for him.
Imagine trying to get promoted to a senior director position at a company while looking like you are fresh out of college. In that case ageism takes a different meaning.