The name of the volcano that Papa Smurf and Homnibus watched from a distance is oddly called Mount Polyandrous. "Polyandrous" is the state or practice of having more than one husband or male mate at one time.
"Smurf on Wood" is the only episode in the cartoon series where Homnibus is voiced by an actor other than Alan Oppenheimer (who also voiced Vanity Smurf and Father Time).
"Smurf on Wood" is a satire on the irrationality of superstitions.