A void left in the wake of a particularly powerful gust of solar wind caused the atmosphere of Mars to dramatically balloon outwards.
And the hurtling ballooning void, the hurtling ballooning vacuum, the infinitely dense hole (oops! not so infinitely dense because of superposition interconvertibility (such as volume energy)), always and forever being left behind by the spontaneous REALTIME Planck Big Bang singularity in universes' infinities closed up (ever closing up to horizon) Horizon?!?!
A void hurtling through...!