I'm going to preface this with the fact I was drunk, still doesn't excuse it. I walked into a frat and there was an older guy there probably late 20s early 30s. He was in a black suit and bald. I loudly said to my friend "look at Lex Luther over there" and laughed, guy looked right at me but was laughing at something someone else said he was talking to but it didn't reach his eyes. Anyway, the next morning I realized the guy looked kind of sickly and probably had cancer. I still feel like an asshole.

Bonus story: I was in a behavioral health hospital and this guy was telling me his social worker handled his finances, he was kind of asking me what I thought. I told him an adult should handle their own shit. Don't know what his diagnosis was or why it was a challenge was but I now know some people need help in that area because they get overwhelmed or maybe get manic and spend recklessly. That one still gets to me too.