Ok, this is a really weird title, even for me. However, this whole blog is about how our cells and DNA were stitched together using smaller endosymbiotic cells and their DNA. If these smaller cells also had mitotic spindles, they may have been integrated into the larger host spindle as well. If so, this means that our mitotic apparatus used to separate duplicated chromosomes is not a simple uniform organelle but has subcomponents to it from cellular endosymbionts. Far fetched? Well, studies have shown that the centrosome complex can break up into units resulting in more than two poles during mitosis. This is different from other studies where centrosomes have duplicated more than once, generating additional poles.
You may check out the centrosome models I have placed on this blog to get a better idea of how this might work.