Vehicon Thrust and Predacon Waspinator were once two owners of the same spark. After the Battle for the Sparks of Cybertron, the two identities were merged to more or less form a single individual: Thrustinator. Shortly after this reformatting he was flung through the multiverse and landed in Axiom Nexus where he encountered his new partner, Heinrad.
Heinrad constantly talks about time, possible time, anti-time, looped time, inverse time... All of this gives Thrustinator a headache. Add in the nebulous stretches of the multiverse and it's a full-blown migraine. For a while, he had tried to follow along, but he soon realized that he had no idea what the time traveler was talking about. All Thrustinator knows is that he can't go home until he and Heinrad fix the past and prevent a catastrophe. He wishes they'd just hurry up and fix it already.