Lacking in accuracy

Just after eleven this morning, I was hurrying to complete some errands before walking across town for an appointment, and as I strode down Parks Road I noticed some fine tall dandelion clocks. The first two puffs were perfect, an explosion of seeds floating away on the breeze, and then all that remained were a few odd seeds caught in the sepals and refusing to budge. These stuck, even after many more than eleven frustrating blows. I think dandelion clocks have a design flaw...