Read this following song and answer the question.

Count on

Me Bruno Mars

Oh-oh

If you ever find yourself stuck in the middle of the sea

I'l sail the world to find you

If you ever find yourself lost in the dark and you can't see

I'l be the light to guide you

We'll find out what we're made of

When we are called to help our friends in need

You can count on me like one, two, three

I'l be there

And I know when I need it, I can count on you like four, three, two

And you'll be there

Cause that's what friends are supposed to do,

oh, yeah

Ooh-ooh-ooh-ooh

Ooh-ooh-ooh-oob, ooh, yeah, yeah

If you tossin' and you're turnin' and you just can't fall asleep

I'l sing a song beside you

And if you ever forget how much you really mean to me

very day I will remind you,

We'll find out what we're made of

When we are called to help our friends.

"If you ever find yourself stuck in the middle."

What does the underlined word refer to?