Brendan, if you're still around I'll bore you with my one famous runner anecdote.
I was an adult recreational runner, no particular talent.
In either '86 or '87 I was running the 25km "New York City Marathon Tune-up" as a training race (did it every year in those days). Just after the halfway point, the guy next to me asked: "Do you know who we just passed?" "No." "Henry Rono." "OMG!"
Turns out that Rono, after his glorious multiple WRs of 1978, developed a drinking problem and gradually fell on hard times. Later I found out that he often entered NYRRC races, went out super fast and blew up. So no big achievement on my part.
Funny thing: in addition to being a bit overweight, Rono appeared to have a kind of "squat" body type; I wouldn't have suspected that he was an all-time running great. Must have trained insanely hard in his heyday (not surprisingly).