Hellium Girl

I held you down as you filled up with Helium.
I tied string 'round your swollen feet and let you go.

Helium girl, don't go too far.
Wherever you go I'll pull you back.
Helium girl, don't go too far.
Wherever you go I'll pull you back.

You can't answer my calls anymore. There's no signal in space.
So I talk to you through this can in my hand, but your feet are all I hear.
So I pull you back down, taking care on the re-entry