Just ask her kids. Winslet says they are still talking about the day she had to projectile vomit on set.

Winslet portrays a mother who sets out to settle a dispute over a playground fight involving her son. But she literally can’t stomach the accusations of the other mother, played by Jodie Foster.

“Carnage” is a sort of “Lord of the Flies” for the parental set — where civilized intentions go horribly awry as each character reveals their baser sides while trying to settle a playground dispute.

It is based on a play by Yasmina Reza.