If, as you are going through your mail on a late autumn afternoon, you open a parcel with a slide and photographs of what appears to be a beautiful silver train soaring above the clouds high over a majestic lake without any visible means of support, and in the same envelope there is verification from the United States Air Force that this slide is authentic, not having been doctored in any way according to extensive tests, what would you do? Lisa and Paul O'Donnell, two high school teachers who received the parcel, sought to mail it to Bergen Townsend, the man whose name and address they found inside. But when the parcel was returned to them marked Recipient unknown. No forwarding address, the O'Donnells decided to spend their Thanksgiving break in Lake Winnipesaukee, NH, and see if they could locate Townsend and return his unusual slide. And here is where they encountered the strangest experience of their lives.