Three other tracks appearing on the album were recorded on a cassette recorder at the house, the a cappella poems " The Dust Blows Forward'n The Dust Blows Back " and " Orange Claw Hammer, " and the improvised blues " China Pig " with former Magic Band member Doug Moon accompanying Van Vliet on guitar . " The Blimp " was recorded by Zappa in his studio while on the phone with Van Vliet prior to the album's sessions; Jeff Cotton was put on the phone to recite Van Vliet's latest poem, which Zappa recorded and put over a Mothers of Invention backing track ( which had been known to the Mothers, unacknowledged on " Trout Mask "'s credits, as " Charles Ives " ).
