A New Mexico man was accused of attacking his parents with a knife because of a lack of air conditioning in their home, according to a report.

Robert Generosa of Albuquerque lost his cool and threatened to stab his elderly parents, Fox6Now.com reported, citing court documents.

Generosa then sliced his father’s face multiple times and whacked him on his head with the knife handle, according to the report.

After a police stand-off, Generosa was charged with aggravated battery with a deadly weapon.

Neighbors were stunned by the bloody incident.

“I’ve seen him for years, and he’s always been a nice individual, you know?…He’s been very kind,” William Gray told Fox6Now.com.