The film's release also was delayed (partly because of the use of solarization, a then-new technique both laborious and expensive) and badly under-promoted. The sole television commercial was a confusing minimalist close-up shot of a man's head (John Brockman); after 30 seconds the man smiled and the name HEAD appeared on his forehead.[6] This ad was a parody of Andy Warhol's 1963 film Blow Job, which only showed a close-up of a man's face for an extended period, supposedly receiving 'head'.