This idiom means - to suddenly look happy.
What is "Light up".
This idiom means, to smile a lot.
What is "To be all smiles".
This idiom means, to tell someone your secret thoughts and feelings.
What is "Bare your soul".
This idiom means: loud and happy sounds that come from people when they are amused (like a hurricane wind.)
What is "Gales of Laughter".
This idiom means, to become very angry or unreasonable.
What is "Throw a tantrum".
This idiom means, to start to cry or laugh helplessly.
What is "Dissolve into tears/laughter". (Break into tears/laughter.)
This idiom means, to tell someone something that has been worrying you.
What is "Get something off your chest."
This idiom means, to show your feelings, especially your love for someone.
What is "Wear your heart on your sleeve."
This idiom means, to stop being careful about showing your emotions.
What is "To lower your guard, drop your guard."
This idiom means, to lose control of your emotions.
What is "Lose your head".
This idiom means, to become extremely upset.
What is "Go ballistic".
This idiom means, to get control over your emotions.
What is "Get a grip on yourself".
This idiom means, to try not to smile or laugh.
What is, "Keep a straight face".
Correct this sentence: When his computer crashed, he "went into gales of laughter".
What is "When his computer crashed, he went ballistic."
Correct this sentence: Suddenly their faces just lit down.
What is: "Suddenly their faces just lit up".
Correct this sentence: He threw a ball in the supermarket.
What is, "He threw a tantrum (fit) in the supermarket."
This idiom means, to do or say something to get rid of strong emotions.
What is "Blow off steam or let off steam".
Correct this sentence: I couldn't keep a crazy face.
What is, "I couldn't keep a straight face".
Correct this sentence: She just had to get something off her head.
What is, "She just had to get something off her chest".
Correct this sentence: Don't go postal on me!
What is, This idiom is correct. It means to go ballistic or crazy. This is a modern idiom.