Not exactly but I did run my pr 800 in 70/84. Also during my sophomore year in high school I was in 4th place at my district x counrty meet around the 1/2 mile mark and ended up 22nd.
I always thought it would be amusing to go tearing off in a sprint during some large race without a separate elite corral just for something different. I could probably keep up with elite female runners for the first 400 meters. Or just at a local race with the top male runners around 16 min. Just to see their confusion. But I wouldn't actually do it.