Mars wasn't the best podracer pilot on the circuit, but he had made quite a name for himself in the minor rim leagues, and he felt confident that he could pull off a victory in the Boonta Eve Classic. Unfortunately, he made the mistake of imbibing one too many drinks at Boles Roor's glimmik concert the previous night, and the even worse mistake of hitting on one of Sebulba's Twi'lek masseuses, Ann Gella. The Veknoid Teemto Pagalies, who had long been infatuated with Ann, overheard this encounter.
Outraged, he reported the incident to Sebulba the next day, who responded by subtly sabotaging Guo's racer. During the second lap, Sebulba was vexed by the fact that Guo's Collor Pondrat Plug-2 Behemoth was still in the running, and to finish the matter he broke off a small bit of his Pod and tossed it behind him into one of Guo's colossal engines. The craft was shattered and Guo's Pod was sent flying.
Many believed this was the end of the swaggering Phuii pilot, but Mars managed to survive and limped back to his home planet of Phu, but unfortunately wasn't able to buy Ann Gella. However, while he was being attended in a medcenter, a bitter Sebulba persuaded race officials to put all of Guo's belongings to be auctioned - including his two slave Rodian mechanics, Pax and Trax Bonkik (although Pax was purchased by Teemto Pagalies prior to the auction). It was a long time before he showed up on the Podracing circuit again.