I first saw trackstanding from a geared bike in the movie "The Man With One Red Shoe" (Tom Hanks, Darryl Hannah). I didn't see it again for another twenty-five years until a rider did it while waiting for my slow self to get to the top of a climb. He was using the slope of the climb to help keep him steady.
I have a hard enough time not falling over while standing on the ground so I will not attempt trackstanding on my roadie. I've done it a bit on my fixie but only for a few seconds. If I want to impress anyone, I ask if they want to see my gun collection. They always laugh at my Charles Atlas pose but I know they are secretly jealous.