The Reds entered injury-time a goal down to Brentford and, having been introduced in the 87th minute, McTominay hauled the Reds level before clinching the three points with a last-gasp header.
Scott described the feeling after the match as an "out of body experience," and in his press conference following the win, Ten Hag was quick to praise a player that he says "gives his life" for Manchester United.
"He is Manchester United in everything and in his heart," began the boss. "So he's playing for the badge. He gives his life.
"And when you're coming on and you give this to the team, it tells a lot.