"Balak, balak, balak..."
“The street goes down and down, always unpaved, nearly always hidden from the sky. Sometimes it is so narrow as to permit only one-way foot traffic; here the beasts of burden scrape their flanks on each side as they squeeze through, and you have to back up or step quickly into a doorway while they pass, the drivers intoning, ‘Balak, balak, balak ...’” (“Watch out, watch out, watch out!”).
From Paul Bowles 'Fez: Behind the Walls.'