It had been a busy shift. I could tell my paramedic partner was physically and emotionally spent. Each time we delivered a patient to the hospital ER and signaled 10-8, it seemed the dispatcher couldn't wait to give us another call. While on a run, for reasons amiss, my partner began playing with the electronic siren. The settings were high-low, wail, and yelp. He found a spot between two of them that sent the sound signal into a spasm. Our ambulance unit sounded more like a very loud ice cream truck going down the road. I began laughing so hard that tears were rolling down my face. As I weaved through a busy intersection, I caught glimpses of motorists staring at us. There was a combination of disbelief and terror in their faces. I quickly reached over and changed the siren setting. "Todays' lesson for us", I said, "Never, ever play with the siren". My partner grinned and we continued on our run.