sudden

An allergic reaction occurs when the body reacts to the protein in peanuts, thinking it's a threat, which triggers a sudden release of chemicals.

In the western state of Maharashtra, a family is struggling to come to terms with the sudden loss of three of its members.

Another example might be myocarditis, an important cause of sudden cardiac death that is more common in men than women, at least until the age of 50 or menopause.

“All of a sudden they had the helicopters go in and they had the police sirens, then there was probably five shots, bop bop bop bop bop,” she said.

That sudden drop can be deadly - especially if a driver swerves to avoid an obstacle.