Please keep in mind this is a joke.
One day was particularly dark for the Galactic Terran-Vasudan Alliance. For good reason.
On that day, Alpha 1 (real name unknown) was having a shower in a GBn-55-class bath tub, his very favorite class of all bath tubs. While taking a bath, he was remembering his kills for that day: a bunch of SF Nephilims, Nahemas, and even more fighters of all classes imaginable. He was also remembering the excessive amount of whining he had received from his wingmen for him stealing their targets. Of course, that does not matter now: they are all dead anyway, and Alpha 1's conscience is clear for even his supernatural and indisputable competence could not do anything to keep those guys alive. It's a whole different keetle of fish that he did not care at all. He was happy to let those fools to their fates.
In a fatal instant, he let himself be succumbed to his memories, and he could not notice in time that he was slipping. He hit his head pretty hard, and ten minutes and thirty-two seconds thereafter, it would have been a mistake to consider him "alive."
Coincidentally, the Shivans annihilated the entire galaxy in the eight hours that followed. There was no Terran or Vasudan left to determine if Alpha 1 was assassinated by a Shivan agent dressed like a Terran, or his supernatural abilities failed him for a single second.