Benjamin Franklin famously said, "In this world, nothing is certain except death and taxes." Had he been alive today, he would have said "death, taxes, and Twitter threads asking for stories about meeting a celebrity." People love hearing stories about celebrities in the wild, and the internet always delivers. The latest call-out was for "worst interaction with a celebrity" stories, and they vary on the cringe scale.
I deliberately didn't include the tweets that boil down to "I approached this stranger in public and they ignored me." These incidents would still be awkward whether or not someone involved was famous.