Mr. H. Dumpty (featured in Lewis Carroll’s Through the Looking Glass) discusses matters with Alice while he is perched on a wall. As you may know, things do not work out for him, though up to that point he seems to feel he knows it All.

Any Rhino would point out that wall sitting has related concerns. Walls come in many sizes and feature two sides. To avoid accidents, inspect both sides of the Wall in Question.

When did you last hear of a Rhino falling off a wall? That’s right.