Stepping on a cat lung, eh? To come up with such a graphic correlation can only represent repetetive instances occuring in the presance of an enlightened and imaginative mind. Love it man.
Sounds like the pushrod from the pedal where it contacts the recess in the brake booster (under the gator boot) may need some lithium lube shot in with a can and straw.
Had a guy with a squeek in his clutch pedal once. Checked everything, lubed fulcrums, couldn't replicate his complaint. Turns out the noise was coming from his marachi sandals as his foot bent to release the clutch.