[ While what she can see is certainly silly looking, that's mostly legs and hands, probably not even the silliest parts. But that's perhaps to his benefit, she'd be distinctly more wary if she could see how much he looks like a clown. ]

That you even ask is what proves how useless it is! I suppose perhaps you could eat many at once, or through a fall? But trying to apply it to other areas wouldn't work, because this is a hypothetical situation where it has to be useless.