Did you bother to notice the speed of the trucks in the right lane?
She was passing them.
Looked like everyone but the truck that lost it knew not to drive fast on that road when it’s wet.
Years ago I-45 north of Houston was the same way.
If you tried to do anything over 55 in the rain you would probably loose it.
People that drove it all the time knew it and kept it 55 and under when wet.
What other traffic did you see on that road? She sat beside the flatbed in the left lane, not passing, for how long? She was occupying the left lane, made a habit of it and made a habit of recording it. She deliberately provoked this.
I drive 75 in the rain all the time on I-37 near Corpus Christi. Drive about 45,000 miles a year. Never spun out.