Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
This is a fun silent movie directed by the great Todd Browning who directed the cult classic "Freaks" in 1932 and "Dracula" with Bela Lugosi in 1931. It stars John Gilbert as Cock Robin the "ballyhoo man" at a carnival in Hungary. Every woman who looks at him wants him and he is happy to take advantage of all of them, but it gets him in trouble with their boyfriends and with the law. We see him as the barker for several sideshow acts - Zela, the half lady, Arachinda, the human spider, and Neptuna, the queen of mermaids, all of whom lust after him. We also see Zalina, a wild woman in a leopard skin dress and blonde afro, pull a large Burmese Python out of a box and drape it around her shoulders. That's all we get snake-wise in the movie, a lizard has the best role. Zalina pulls out a Green Iguana as part of a snake-oil pitch, holding it in her arms as the salesman declares that it is the deadliest of all poisonous reptiles and "from the oils of these reptiles is made this life-giving youth-restoring liniment." But the iguana jumps into the crowd and bites a man killing him. This scene is included to set us up for the finale when the boyfriend of the carnival's "Solome," jealous of her affair with Robin, steals the iguana and puts it in her attic, knowing that Robin has been hiding from the police there. But things rarely go according to plan when reptiles are used as weapons. The iguana gets loose and both men narrowly escape being bitten by its deadly fangs. (I guess in 1927 nobody had ever seen a Green Iguana or at least didn't know that they're not venomous.) Finally a policeman shoots the deadly green monster but not before it bites the bad guy on the neck so he can keel over and leave us with a happy ending.
The real Green Iguana is replaced with a big rubber lizard when we see it jump into the crowd and fly through the air at people, but the effect is done quickly and is not too noticable.