"If you get behind me again I will f***ing bang you out, do you understand me?" he said, in a clip shared widely online,
"I'm just trying to do a job. Have you got a job?" he asked mockingly.
"Where do you work? Footlocker or McDonald's?
"How about sorry for trying to mess up my work? How about that? Do you know how hard it is to broadcast live to half a million people?"
Doing a furious jig, Watkinson imitated the man's earlier actions and asked: "Do you know how hard it is to concentrate? It's quite hard without someone in the background going: 'Ooooh, I want to be on TV'."
Commenters online took issue with Watkinson namedropping McDonald's and Footlocker.
"If a McDonald's team member started swearing at an annoying customer they'd be sacked before they finished their sentence," wrote one.
"Fair enough he was angry, but he came across a bit David Brent/Alan Partridge," said another.
"Pretty frustrating when the peasants ruin his workplace, which appears to be 'anywhere on earth at all times'," someone else joked.
A spokesperson from ITV apologised for Watkinson's rant and said that he had been spoken to and "the matter is being dealt with internally".