lost on a tightrope

In Taylor Swift's song “Innocent,” I heard a line as “Lost your parents on a tightrope,” and I thought, Huh, I guess this is sort of a Robin trope, orphaned kid of circus performers, that's kind of interesting.

And then I checked the lyrics and found the line is actually “Lost your balance on a tightrope.”

Which makes more sense in context, but it's less Batman-ish.