The first time I saw one was when I'd gone down there to fetch my Dobes out.
[they loved to 'den' down there in the summer]
The light switch is to the left, right at the door and I flipped the switch, happened to look over and one of those things was perched about an eighth of an inch from my thumb, visibly breathing.
I almost knocked myself out jumping backwards and smacking my head on the log door sill.
I stood outside and yelled for the dogs after that.