I was browsing the web a few days ago and saw these photos I'd never seen before.
Sorry if these have already been posted somewhere else, but I thought I'd put them here incase other people hadn't seen them.
I found them rather interesting.
http://imgur.com/D66vzRF
http://imgur.com/H3yOraw
The first one is from a behind-the-scenes and making of shot I found on the blog of somebody that actually worked on set. I knew from watching the 50 Greatest Harry Potter Moments documentary that Pam Ferris wore a latex suit beneath her clothing, but I'd never actually seen it. I think it's rather interesting, and would love to try something similar.
The second is taken from a museum of props and such, essentially just, what seems to be, a cast of the inflated shell.