You and Linda had the company of others.  My wife and I were stranded 100's of feet in the air once on a railroad overpass that spanned a river.  My wife's snowmobile ski became stuck in one of the railroad ties.  It was only her and I so it was up to me to take the ski off in the dark with the headlight from my snowmobile using the lame set of tools they provide with the sled.  I couldn't fall through the ties because my body wouldn't fit but my leg was dangling 100'+ in the air while I laid down to free the ski looking into a pitch black canyon.  It was one of those "remote" experiences in the middle of nowhere in the darkness that you never forget.  Their were walls and a roof on the overpass but the gaps in the ties were side enough for a small child to fall through.  Yikes!