it's not an easy one to pick up just from watching. And certainly not something you'd correctly pickup from the vocal fan in Raleigh during the broadcast (hopefully not representative of the NCST fan base which I have a lot of respect for with the one exception that thinks everything is stalling).

If someone is pushing, as in arms fully extended or giving a shove to get the opponent out of bounds, it would actually be stalling against the pushing wrestler. So given that, there is a bit of subtlety that it needs to be done with. That's usually taking a shot like a double-leg or using underhooks or overhooks and forcing the opponent's defense to go backwards resulting in both being out of bounds.

It's more likely to be called when its the same wrestler going backwards the entire time, when they've established position close to the boundary and still go out. There's more consideration to the aggressive wrestler making an attack and being rotated, or when the defensive wrestler tries a toss or change of direction. Each time the ref has to indicate there was sufficient action otherwise call stalling on the wrestler that went out of bounds first.

They recently changed the rules to get more calls, encouraging action towards the center and create more scoring. There's also some thought to make it closer to international freestyle where any stepout results in a point. It did accomplish less of defensive wrestlers with a lead using the boundary to milk the clock because the takedowns would finish out of bounds.

I personally like that direction, but think we'd be better just having the stepout to match the international freestyle rules. For instance on a single leg that attacking wrestler can't finish, they can still get the pushout and it truly is not stalling. That would encourage more attacks and get more wrestlers used to protecting center (keeping good position) and hopefully get the USA teams better at freestyle.