Self-Made Ghosts

My Wednesday Night IRC game totally rocked. The PCs scared each other to the insanity point. The light wind, moonlight, thick fog, a tunnel, and a black basalt statue became a deadly ghost in their minds. The next day, they finally saw the statue in the light of day and realized they had let their imaginations get the better of them, but it was just wonderful fun! They came this close to hoisting their mounts up a fifty foot wall in order to travel on an ancient ruined road across the badlands rather than take the tunnel built at immense cost for the sole purpose of avoiding the badlands!

I did almost nothing to trick them. This was all their own doing. The sound of the wind across the other end of the tunnel was a low varying moan. That was the only thing I did. The rest was the player characters' doing. They interpreted everything I told them through a supernatural rather than a natural filter.