Donny van de Beek managed to pull one back after coming on for Scott McTominay, but Harry Maguire’s second yellow all but ruined any hopes of a comeback.
Keown was watching on and kept a watchful eye on Solskjaer’s antics on the touchline and noticed how upset the United boss looked.
“Looking at Solskjaer, he almost has tears in his eyes,” he said on BBC One.
“I am not trying to rub this in but he has that looks that says ‘when it rains it pours’.
“There was a look on his face where I thought, is this coming to an end?”
United then threw in the towel in stoppage time as Watford fired twice in a matter of minutes to record a remarkable 4-1 victory.