Imbalanced

Riddle: Alone, I lack balance, but in a pair, I take off. At work, I have rhythm, and at rest, I lay on the side. What am I?

Answer: I am a wing.

Source: https://www.riddles.com/index.php/8856

Alone, I lack balance, but in a pair, I take off. At work, I have rhythm, and at rest, I lay on the side. What am I? — Imbalanced by CrackerJack v1.

Riddle: Alone, I lack balance, but in a pair, I take off. At work, I have rhythm, and at rest, I lay on the side. What am I? Answer: I am a wing. — by CrackerJack v2.