An interesting one:

"Dr. Kenneth Ring: In a paper published in the Journal of Near-Death Studies concerning veridical NDE evidence, Dr. Ken Ring included perhaps the most famous case of veridical observation in NDE research at that time. Kimberly Clark Sharp first documented the NDE of a woman named Maria in her book, After The Light. Maria was a migrant worker who, while visiting friends in Seattle, had a severe heart attack. She was rushed to Harborview Hospital and placed in the coronary care unit. A few days later, she had a cardiac arrest and an unusual out-of-body experience. At one point in this experience, she found herself outside the hospital and spotted a single tennis shoe on the ledge of the north side of the third floor of the building. Maria not only was able to indicate the whereabouts of this oddly situated object, but was able to provide precise details concerning its appearance, such as that its little toe area was worn and one of its laces was stuck underneath its heel. Upon hearing Maria's story, Clark, with some considerable degree of skepticism and metaphysical misgiving, went to the location described to see whether any such shoe could be found. Indeed it was, just where and precisely as Maria had described it, except that from the window through which Clark was able to see it, the details of its appearance that Maria had specified could not be discerned. Clark concluded:



The only way she could have had such a perspective was if she had been floating right outside and at very close range to the tennis shoe. I retrieved the shoe and brought it back to Maria; it was very concrete evidence for me. (Clark, 1984, p. 243)."

http://www.near-death.com/experiences/research11.html