Crawl Cart

Crawling in one block is very good, but slow. I think it would be useful to have a 'board cart' that you can lay on and push yourself along a track. This is done in real life and would enhance mining while still keeping a modicum of risk, due to environmental hazards in a one block space. It would feel quite fast. It would also be cheaper and easier to make than other rail systems. The player would be pushing it forward the same speed as walking. The player would not be able to push anything else while laying on it and it would not be redstone reactive. I'd like it to need a couple of half planks on two iron ingots. It would also make rails a bit more valuable, which is good because of namesake.