A woman allergic to latex told a court how her estranged husband tried to kill her by putting his fingers in her mouth while wearing a rubber glove.
Allison Phelps told Bristol Crown Court that Charles Henson attacked her at a house in Gloucestershire, last March.
Mr Henson, 39, of no fixed address, denies attempting to murder Ms Phelps.
He also denies trying to gas her, a charge of aggravated burglary and wounding her new partner with intent to cause him grievous bodily harm.
The court heard that Henson, an American citizen, had turned on the gas oven and hobs at the home of Ms Phelps in Coalway.
Prosecutor Lynne Matthews said: "He had with him nine latex gloves... He also had two knives.
"He was discovered at about 5am by Ms Phelps' family, one of whom was disturbed by a dog barking and a smell of gas.
"He grabbed hold of his wife and, in the belief that she had an extreme latex allergy, he thrust his gloved hand into her mouth, announcing that she had four minutes to live.
"Her new partner, Michael Phelps, grappled with the defendant. He was wounded four times and 35 stitches were later required to close wounds."
The trial continues.