A herd of elephants could move past you sleeping in a camp in the bush at night within throwing distance and you wouldn't know about it until you saw the droppings and tracks the next day. They can be pretty stealthy when they feel like it - it's just how elephants roll.
I think the more important thing to notice here is that the elephant could just as easily have broken the wall and walked through; instead, it didn't cause damage, just got the delicious food to fill its hungry belly. Ten points for Elefandor!
Right now I can't think of anything more "tarded" than someone looking at this and not realizing the elephant just found it less of a hassle to simply step over the wall.
