Running with Good Music

I love it when a really good song comes on my iPod while I'm running.  If I'm by myself, sometimes I like to sing along to the song and really get into it.  I was running on a new trail that was built near my house today, and a song came on my iPod that I really like.  I decided that I was going to have fun and really get into the song and sing along, especially because I didn't see anyone else on the trail.  All of a sudden, this girl came up behind me and took me by surprise.  I felt really silly, but she was listening to music too.