Two short lines carry a surprising idea: that losing a disability could feel like a loss. We usually expect that when something difficult disappears, relief follows. The speaker admits the opposite happened, and the question "Who knew...?" suggests they were caught off guard by their own feelings.
The poem doesn't say what the disability was or how it went away, so the reader has to fill in the gaps. That openness is part of its power. A disability can shape a person's routines, habits, and sense of who they are, and when it's gone, a gap may remain where it used to be. The speaker seems to be noticing that absence for the first time.
The mood is quiet, reflective, and a little bewildered. There's no complaint and no celebration, just a small, honest confession. The title, "Mini Poem #3," fits: it's a brief thought, offered without explanation, which makes it feel candid and a bit vulnerable.