I'm pretty sure the pen just implies that he's thinking up the lyrics to the song and he's looking at his hand, unconsciously thinking of writing them down, but he can't find a pen.
Or playing the melody on the violin while thinking of the lyrics, looking at the back of his hand on the bow
I'm pretty sure the pen just implies that he's thinking up the lyrics to the song and he's looking at his hand, unconsciously thinking of writing them down, but he can't find a pen.
Or playing the melody on the violin while thinking of the lyrics, looking at the back of his hand on the bow
Or playing the melody on the violin while thinking of the lyrics, looking at the back of his hand on the bow