snap out of it
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snap (one) out of (something)
To cause one to abruptly recover from some negative or undesirable condition, emotion, or situation. I was in a state of shock after the crash, but hearing my daughter's cries snapped me out of it. The president's emergency funding measures seem to have snapped the country out of the recession.
snap out of (something)
To suddenly recover or be freed from some negative or undesirable condition, emotion, or situation. Alex has been really gloomy lately. I hope he snaps out of it soon, because we'll need him to present our project to the supervisor next week. The company is hoping to snap out of their recent sales slump with the launch of their latest smartphone.