The five Raptor 10D engines could provide more than 400 tonnes of thrust, and after the dismantling, Orion had a mass of 330 tonnes. Based on the conservation of momentum, the rocket engine had to expel enough high-speed mass to effectively reduce Orion's high speed.
Orion's computer precisely controlled the engine via a flight program that Tomcat had written. However, to reduce the errors in the Raptor 10D's thick nozzles to the level of millimeters was impossible. Their original use case was not meant for the vertical descent of the spacecraft. For instance, the rockets that allowed the Falcon 9 to descend vertically relied on sensitive sensors and specialized feedback control mechanisms.
Tomcat didn't have any of this, so it could only use the most brutal and simplest method. It directed the rocket engines' nozzles outward to their maximums, crazily pushing the safety redundancies to the limits. This allowed Orion to hang in midair like a tumbler.
