This is my 3yr old miniature pony.
Her name is Ruby and she is very cheeky and cute!!
On this occasion, she crawled underneath a low wooden bar into a small triangle with a tree in the middle (the bar was to keep horses away from the tree). Once she was in, she could not get out again as the area was too small to turnaround in. So she sat there making faces (like th one in the photo) until we pulled the bar off and she galloped off without a second thought.