BTW, I exaggerated. They wouldn't even call in an argie bargie, a single shove to the face would be classified as niggle. Hell, I saw a 6' 8" Brodie Retallick shove a 5' 10" TJ Peranara in the head harder than that and they freaking play together on the same international team. They were playing for opposite Super Rugby clubs that day and TJ couldn't stop Brodie from scoring, there was talk and a head shove. Then after the game they had a beer in the shed. That kind of stuff happens in physical sports.
All that said, it was really stupid of Gregory to do it because he plays for the NFL and they absolutely won't tolerate that. He has to be smarter.