Invisible Pellet

From the (possibly, someday) forthcoming album entitled "What happened to the Cells I used to Know (or: Songs of Loss and Delight from the Lab Bench)?" I present the first verse of "Invisible Pellet!"

Invisible Pellet, where did you go?
Invisible Pellet, I've got to know
had you here just the other minute
this is your tube, and I know that you were in it

Oh, Invisible Pellet, please come back to me!