Players are running around like the Fast Zombies from Half-Life 2.
Call of Duty Modern Warfare 2 G Walking exploit

Every new Call of Duty release brings with it new experiences, new content, and new exploits to discover. The most recently released Call of Duty: Modern Warfare 2 and Call of Duty: Warzone 2.0 are certainly no exceptions. With a player base that could easily be several million large, due to strong sales and the freely offered Warzone 2.0, it almost seems inevitable that some fresh exploits would be discovered.

The latest exploit won't make you invincible or even invisible (though the latter may actually be a bug), but it will make you move like those terrifying Fast Zombies from Half-Life 2.

The community is calling it "G Walk" or "G Walking." Videos were posted to Twitter by Jack Lucky that show off this G Walk, a new movement technique that the "Euphoria" Modern Warfare 2 clan has discovered.

So far, the method for executing this G Walk has not been shared publicly by Euphoria. That is certainly a nice silver lining to all of this as I just cannot imagine how unbearable landing a shot on players using this would be.

While there is that previously mentioned silver lining, there are a couple of unfortunate things to add on to this story. G Walking isn't the only broken movement exploit occurring in Modern Warfare 2 and Warzone 2.0 right now. There is also the "Superman" as well as exploiting some physics interactions to send your character shooting off in various directions.