Where, according to PF, are the lunatics?

Question

See ya TJ!

Answer 1

They're on the grass, we've got to keep the loonies on the path

Answer 2

The lunatic is in my head...in the hall...on the grass

Answer 3

Outside of the asylum.

Answer 4

he he hahahaha see you on the dark side of the moon

Answer 5

on the grass

in the hall

and

in my head

And if this answer is true

I'll see you on the dark side of the moon!