Lawks a lawdy, that's terrifying! Put it back!
It's the eyes that got me. Don't worry, I don't own this decoration. I just came across it on a vintage site online. It is for sale, though.
Groo. Vaguely amphibian? I might put a bid in.
It was apparently found in a little old house on Galverston Island in the US. More info here: http://www.etsy.com/listing/47736939/vintage-1920s-paper-mache-pumpkin-jack-o