He had his guitar with him and played some music, so no one can hear him.
"I can feel the animal inside
My resolve is weakening
Pounding on the doors of my mind
Its nearly overpowering
I cannot begin to describe
The hunger that I feel again
Run if you intend to survive
For the beast is coming to life"
It was an obvious song about werewolves or rather about himself and how he felt. How he always felt his urges and how now he feels he is weak. He has those moments, where his animal side is overpowering. The hunger he feels, the physical one for flesh or the carnal one thats more womanly. But either way, food or pleasure, he tells the metaphorical listener to run or else the beast will come to life