Basketball or knees?

It was during basketball practice one day
My knee popped backwards then in.
Noone saw it and noone knew
And of course I didn't care.

It was later that night I realized
My knees were swelling up inside
And man, I tell you, It HURT!

My dad told me to get some ice
And maybe that would help,
But it sure was a pain and they still ached
Thanks to my weak knees.

The I was told to make a choice
For if I ever hurt them again,
I would definitely have to choose:
KNEES OR BASKETBALL?

And man...that really hurt...