Wilderness sledding that is.
Deer poop, sharp sticks. Hike in, hike out.
Hit it just right, deep snow, but with a thick crust. So it was easy to walk around the woods and explore for good lines. No one was hurt. Dog chose to sled of his own free will, before you write in to express outrage.
Highlight of day: watching American Sign Language being spoken with mittens on. Challenging, but apparently possible if it's cold enough out.