Is it common to turn a horse loose from the paddock to their stall on their own?

its not really common, but people do it. At the barn i go to, since there are over 60 horses, they fence off the place they go through. There are two barns, so the just open the paddock door and let a few go at a time, they run through to the old barn, if their stall is there, they go in, if it isn't, they go on to the new barn. Every part is fenced off, although i somehow doubt the horses would want to escape. I mean, they only do that if they have to bring in all the horses for dinner, and i think they would know the routine enough to know that food is waiting in their stalls. I once helped, a few people wait behind the fenced off area and close the stall doors as soon as the horse goes in. To help, you need to know all the horses well enough to know which one is which, so in case one horse went into the wrong stall. Once, when i helping, tango went into sherlock's stall, so sherlock went into cher's stall, so cher had nowhere to go... lol, we had to move all of them cause tango thought sherlock's stall was his... lol