Applying descriptive terms to running performances is always a subjective undertaking. I just returned from the D.C. public school championship, which was run on a five km course which was undoubtedly short. The girls winner was over twenty minutes. I would not cavil with a mother who describes her daughter's sub 19:00 as "pretty good."
as for the question initially posed here, the hospital employee has a simple choice: either let the matter go entirely or confront the fat RN fully, and I could understand either reaction. When, at some point in our lives, we have trained and competed hard to reach whatever performance levels we were able to achieve, it's really difficult to listen to every Tom, Dick and Harry say, "Oh, yeah, I used to be able to do that, but now my knees bother me..." For whatever reason, military guys seem to have a particular weakness for this sort of stuff.
I suppose there is nothing to be gained by pursuing it. Believe me, the guy is not open to being persuaded he is mistaken. It's a no win to argue the point, but I fully understand the urge to do so. I really don't get the psychological dynamic, although in some cases, I suppose it's just a misunderstanding of numbers. But as for the deliberate deception, I fail to understand it. More than 25 years ago, in grad school, I wandered into a weight room for the only time in my life. My friends asked me to try bench pressing. I weighed around 140 at the time, and if memory serves, I think I maxed out at around 110, and got a very sore back for my efforts. I can't, for the life of me, imagine standing in a driveway telling a muscular neighbor that I used to be able to bench press 250.