I have not.
But on my run this morning I came up on a guy who started talking to me and we ran together for about ten minutes before going our separate ways. He told me he had taken his wife to the hospital at 3 a.m. because she was starting to go into labor. The hospital admitted her, but they soon determined that she would be in labor for the long haul before delivering. When his mother-in-law arrived at 7, he snuck out for a twenty miler because he is getting ready for a marathon in about a month.
I have no way to verify if this is true, but somehow I doubt he made it up to tell a complete stranger. If it is true, it's pretty hardcore.