Americans regard Capt. Chesley ''Sully'' Sullenberger's emergency landing on the Hudson River as a near-mythical act of true heroism. In this absurdist satire, a similar splash landing proves to be a full-scale hoax, not a miracle, and two passengers a trafficker of celebrity sperm and a puppet-armed news anchor find themselves at the center of the conspiracy. The cheeky send-up in This Is Your Captain Speaking is aggressively experimental, but Methven manages to tell an engaging story amid the antic high jinks. B+

