I know exactly what manoeuver you’re talking about. You just have to switch right for left to picture it here!

That’s a really good example of gaming the system in a way that doesn’t cost anyone else anything.

Gaming is best when it doesn’t adversely affect other people in the system.
A recent traffic related example of mine:
There is a busy intersection near my local shopping centre where everyone tries to do a u-turn. Often you have to wait two or three sets of right arrows (in Aus) to get through and it’s a major pain in the arse.

So instead I turn left at the intersection, do a quick u-turn in the side street and come back straight back out with the right arrow. In the meantime all the other cars are stuck waiting to u-turn!

I know it’s hard to picture, but if you understand my description, you should try it too!