Here is a HDTV version of my explanation of the Hungarian HellBox. When we were on a tour passing through Budapest, the Tour Guide told us to make sure that we purchased one of these boxes. So we did. The only problem that one has is remembering how to open it after you get home, as they do not provide you with any instructions... So here is a complete "how to" video so you can get the box open and get the jewlery out that you put in it last year.
