Someone cracks their knuckles after strumming their fingers on a desk.
A bored person is tapping and rubbing their fingers on a tabletop. A person tapping their fingers on desk and cracks their knuckles. Someone cracks their knuckles after strumming their fingers on a desk. The flow of the wind and taps on a microphone and a channel being tuned. wind blowing sound and tapping on microphone and tuning the channel sound.