I don't really understand this one

The ambling countryside, cycling up and down scenic back roads. My good friend falls off his bike and cuts his knee.

"I KNOW!" says I. "I'll call 999!"

I trek to the nearest house and lo and behold, there's a funking house party gan on. My old school pals are there but they are laughing at me. I ring the Emergency number.

"Hello Emergency services speaking"
"Hello my friend is dieing out here OMG!"
"I'm sorry but we do not attend calls unless you tell us your NHS number"
"WTF?
NO WAY!"

So I trek back to my friend and the family have appeared and are already healing him of his injuries. I look at the moon in bemusement. Hmm.