Monty Python member Graham Chapman has been dead since 1989, but he’s still got a new 3-D movie coming out — and he provides the narration. (And what have you, an actual living person, accomplished today?) A Liar’s Autobiography, due out November 2 in select theaters and on EPIX, adapts Chapman’s recording of his own autobiography into a film about his life, with voices also provided by Chapman’s Monty Python colleagues John Cleese, Terry Jones, Michael Palin, and Terry Gilliam. In this exclusive clip, Chapman recounts the conundrum of his sexuality: Later in life, he would come out as gay, but when he was a young man at Cambridge, what (and who) was he to do? It is sort of NSFW, on account of the penis roller coaster, cartoon rutting, and floating boob-clouds. Enjoy!