I not sure I buy this story. It seems to be a takeoff on another industrial accident story. That one was set in the Guinness Brewery in Ireland. In this version two people fell into a vat of chocolate.
Mrs. Murphy answers her door to fin the shop foreman on the stoop. “Mary,” he says, “there’s been a terrible accident at the brewery, Sean will not be coming home.”
“What happened she asked?
“Sean fell into a vat full of beer and drowned,” he said.
“You couldn’t save him?” she asked.
“Lord knows we tried. He got out three times to go to the bathroom, yet he still drowned.”