Mochi very kindly gave me a copy of her pumpkin head. It took a bit of fiddling with the rotation, offset, and scale parameters to make it fit, but I think it looks very Hallowe'eny!!
The falling leaves are a particle effect that somebody set up in the Beginner Zone. We've been having fun playing in the leaves:
From left to right: Ryan Schultz, Mochi, JoJa Dhara, Marko Be, and Ashasekayi Re.