I've had pretty close to this conversation like 50 times:
"Do you run?"
"Yep, I run competitively"
"What does that mean?"
"I have a coach, I train every day, I enter races."
"Like you run marathons?"
"No, my best distances are mile, half mile. I'm impressed by marathoners, I would never want to run that far. I like the short fast stuff."
"Where can you run that?"
"College meets often let you enter if you're competitive. Sometimes there are meets for unattached runners. It's fun."
"What is your mile time?"
"Right now I'm injured but last spring I ran 4:17"
"That's ridiculously fast"
"It's pretty good for my age, but I'm middle of the pack with the college kids"