AYBABTU

No ventilator open
Not a window ajar
No door letting light
Through some tiny scar.

My room I'd locked
As Erebus dark
Now I see here and there
many a strange claw mark.

Befuddled I was
Till I realized
From Satan knows where
Mysterious Rodents materialized.

Cheep-chip-chip-Cheep-Cheep-Squeak
Is "All your Base..." in Squirrel-speak.