The Buddy System: (Mine One)

In a perfect world exploring mines I'd like to have somebody on the outside so if there is a collapse they can call for help. Erich and I have decided to explore the mines further than I went since there are two of us. However neither of us wanted to be the guy on the outside that called for help and miss all the fun of exploring so we both went in. It was about a ten minute and probably 300 feet walk back to where we elected to turn back. There was quite a bit of water and mud. There were other tunnels but they required crawling. If you have to crawl I'm not going.