Beat
You're tapping your fingers against a white wall when you realize the sound you're making is actually a sick beat. You keep going and start singing along. Boo boo boop. Boo do do do doop! Finger beats!
Imagine yourself in a completely white room. All you have is the white walls, your fingers, and your beats. When you stop all you're left with is white noise. Yuck! Keep those beats coming!
はく, ひょう
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This beat is sick, but as you tap you realize you're hacking (はく) up the wall! Slowly but surely, your fingers are hacking out little bits of the wall. And the beats don't sound as good until you move to a new, clean white area.
Imagine hacking the wall apart as you try to keep this beat going. The music is all you have, man! You can't lose the beat now!