"Saw a toad in the road,
Fie, man, fie..
Saw a toad in the road..
Who's the fool now...?
Saw a toad in the road, singing in the Dorian mode.
Thou hast well drunken, man..
Who's the fool now..?"

"Saw two crows on the 5th meridian..etc....
Harmonizing Mixolydian....etc...
etc..etc..
Who's the fool now?

(I've been singing these for YEARS... wonder if they are locally written, or widely known additions to the trad?)