Terrifying noise

Just getting to sleep, window open, when I hear an ambulance at full tilt and a helicopter. I'm off call entirely, but because I'm in town it's reasonable to ask me to show up if they need more hands. 

The questions going through my head:

- am I going to get called in?

- is it one of my patients?

- is it one of my neighbours?

- did I miss something the last time I was in the Emerg?

- would I have been able to handle whatever is going on in the Emerg tonight?

So much for sleeping tonight.