This piece is entitled "Tangiometer" A tangent runs along the periphery of an idea but does not penetrate it. If you are talking about a subject and that subject is represented as a sphere, the tangent will never penetrate the surface of the sphere. Never the less, it still intersects it at one point. Do you know people who constantly go off on a tangent? Never answer a question directly? Sometimes you just want to scream in frustration or laugh and say "wait, what were we talking about?" Here the "Tangiomter" has been triggered and is well on it's way to overload. The arrow on the top points to "high" and the flames at the bottom indicate "overlaod".