I will instinctively start bobbing my head and singing along if a song from one of my favorite bands starts playing. I don’t even have to remember which song it is, it's just muscle memory
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CAST OF THE CRUTCH THAT KILLS THE PAIN
THE RED FLAG WAVIN' NEVER MEANT THE SAME
THE KIDS OF TOMORROW DON'T NEED TODAY WHEN THEY LIVE IN THE SINS OF YESTERDAY-
If someone is feeling down, tired, or bored, they might "perk up" when something good happens or when they hear something interesting. For example, "We perked up when we heard the good news"