A video of Don Lemon knocking on windows at strangers on the subway has gone viral, with some people questioning whether he is doing alright.

Don Lemon, however, apparently enjoys chasing down New York City subways and surprising riders with memes from their windows ... trailed by a laughing and crying emoji. Fellow commenters liked ...

"I would think I was hallucinating if Don Lemon was suddenly knocking on my subway car window to show me a Donkey/Sonic meme." Another users asked: "How do you tell someone, 'Yea Don Lemon tapped ...