If you google air cast you'll see it's also called a walking boot. it looks like a part of a storm trooper's armou but you can take it off to shower etc. Is it a through the joint screw? I was told mine had to be removed incase it breaks but I guess all cases are different! Yeah it was really painful especially post-op I just woke up screaming on morphine. Fun! I got knocked over in a club which sounds rediculous for such a serious injury. Bouncers and a and e staff all thought I was being a bit mellow dramatic and I'd just sprained it... Til they x-rayed it that was! Hope you're healing well and managing to keep it elevated that worked wonders for taking the swelling down.