What's the most hurt you've been from a passing comment?

So I (31m) was working today I'm the oldest in the team by about 8 years and I'm the team leader. One of the 19 year old girls referred to me as the Old wise one today because I was able to quickly answer a question they'd all been stuck on. Then it dawned on me that all these punk kids think I'm old! Emotional damage was real.