Not sure about spacetime, but there's a similar effect mentioned on HN earlier: Earth's magnetic field has a vertical gradient that tiny spiders use to fly, eve

Not sure about spacetime, but there's a similar effect mentioned on HN earlier: Earth's magnetic field has a vertical gradient that tiny spiders use to fly, even in absence of wind. It's plausible that those spiders figured how to alter their magnetic charge to "sail" in this "sea" of electricity.