Grateful Dead - Man Smart, Woman Smarter: Brent gets it?

I saw a video on YouTube a couple years ago where the Dead were doing MSWS. While Jerry's soloing, Brent gives Bobby a wave and then he sings the "Little boy sit on the corner and cry..." verse. When he gets to "the man sat down and he cried too," he throws his hands up and wails like only he could. Jerry smiles and pushes his glasses up. I wanna say it was late 80s, and maybe even a Radio City show. That's my favorite version ever, please help me find it.