From the rectory, the truant boys could hear the minister intoning his sermon to the assembly.

The Days Of Our Lives

There is nothing funny about intoning "God bless America." It is a quiet form of prayer for the safety and well-being (spiritual and material) of the U.S.A.

Ben Casey as per a Google search with the quote. - CLL

honk the horn in the middle of the steering wheel.

Push a great deal of air through the diaphragm while intoning one of a number of syllables: mmmmmm, vroom-vroom, rrrrrrrrr, ppppppp, bbbbbbb, for example.