Identify the theme in this song.
I can feel it in my bones
Here come the tremors
When the ground starts to shake
The theme of the song appears to be about experiencing a physical sensation of trembling or shaking which could be interpreted as fear, anxiety or excitement.
Complete the following task based on the instruction and optional input provided.### Instruction:
Identify the theme in this song.

### Input:
I can feel it in my bones
Here come the tremors
When the ground starts to shake

### Output:
The theme of the song appears to be about experiencing a physical sensation of trembling or shaking which could be interpreted as fear, anxiety or excitement.