1. Join server and go to firestation.
2. Climb both sets of ladders outside to get to very top roof on a firestation.
3. Go prone by low wall.
4. Move mouse so characters legs and feets turn toward the low wall.
5. Observe you feet go through the wall and if you adjust camera angle you can them on other side.
do in third person view to be seen easier, haven't tried looking in first person view