Irritating a highly volatile Sith who was genuinely trying to rescue you was up there a far as horrible ideas.

Vader heard the exceleration and mutters a colorful phrase under his breath, once again using the Force to grip into Kenobi as he sharply veered to one side, so steeply it pitched them at a 30 degree angle while also spinning them on their y-axis a close 160 degrees. All at a speed which has the engine screaming and has them now charging their pursuers.

Hanging into the handle bars one handled, he drew his saber, ignited it and set his course. The Slyphid would back down or find themselves impaled.

The latter was his preference.