Are mushroom clouds in nuclear weapons from a plasmoid forming its own gravitational field ("anti gravity")?

This video shows what looks like a ring of plasma within the core of the mushroom cloud. Plasma self-organization is often described as taking the form of a torus, a plasmoid, and these are associated with their own electromagnetic field that is oriented around the plasma torus.

The way a mushroom cloud rises, it looks like it may be forming around the gravitational field of that plasmoid, and if that is so, then maybe it is also rising through electromagnetic repulsion against the Earth's magnetic field, levitating.