Once me and my sisters were down in County Clare for a holliday when we were kids. We used to have little partys (buy lts of sweets and stuff, play board games and stay up late). So on this occasion we're all having fun and talking at i dunno what time of the night and my big sister says she's going off to the bathroom and tells us to be quiet while she's gone. We're very quiet, I don't even remember talking or anything and she comes back and gives out to us, telling us she's disappointed, that we were being really loud and she told us to be quiet. i still don't know what she heard but it wasn't us and we didn't hear anything...
Anyway, there were five or six of us, and in the evening as we walked to the site, we saw a guy in a red running suit walking through the woods. As he wasn't on path, we thought it was a bit odd, and nicknamed him "Forest-walker". All that night, whenever we heard a sound in the woods surrounding us, we would joke that it was Forest-walker, and made some outrageous stories about him.
I don't remember if we slept that night, sometimes we did, sometimes we didn't. But, the next morning, after we had walked about 100 yards out of the woods, someone turned around and noticed Forest-walker standing at the edge of the trees. We all saw him.