Robert Green and his mom shared an emotional moment over the phone when he gave her the good news.
This is one of those moments you fantasize about. Your dream has just come true, so you call your mom to tell her about it, and she loses her shit. Then you lose your shit. Then you're on two ends of a phone call, both screaming and blubbering with snot coming out of your nose. One of those moments.
Robert Green must have known it was going to be special. That's why he caught it on video. But that doesn't explain why he didn't put on a shirt. Put on a shirt, Robert. Or at least take those nipple piercings out.