Examples:

• When the teacher left the classroom, all hell broke loose — everyone started shouting and throwing paper balls.
• As soon as the news about the company’s bankruptcy spread, all hell broke loose in the office.
• When the referee made a bad call during the match, all hell broke loose among the fans.
• The moment the dog escaped from its leash, all hell broke loose in the park.
• When the power went out during the concert, all hell broke loose in the crowd.
• As soon as she told her parents about the broken car, all hell broke loose at home.
• When the fire alarm went off in the hotel, all hell broke loose as everyone rushed to the exits.
• The second the teacher announced a surprise test, all hell broke loose in the classroom.
• After the politician’s controversial statement, all hell broke loose on social media.
• Once the kids realized there were no snacks left, all hell broke loose in the kitchen.