I really liked the idea of an undead creature as a medic when first coming up with the thumbnails. The third floating choice was when I first struck upon this idea but wanted to refine it. I ended up with an assistant stomach unit so that I could push myself with both hard and soft surfaces. Repossessing organs seemed like fun and I needed a weapon that could incapacitate; so tasers and just stand up to knocking someone over the head. A skull with a spine in a canister seemed like a good idea at the time but it comes across as his own :)