You've Created A Paradox
Insert Metal Gear Solid game over theme here.
Disclaimer: I own nothing but plot bunny cheat device™
--
Cloud stood in awe of the great general Sephiroth, supposedly the greatest hero of all time as he stood before the giant Dragon. The capital D was there for a reason. It was bloody massive!
It could probably eat most dragons for breakfast and still have enough room for a mid morning snack of human. Which both Sephiroth and Cloud happened to be, well Sephiroth was only some part human to be fair to him.
Sephiroth rose his Katana to charge the beast when he tripped over a passing tonberry in pursuit of one of the MPs that they had taken with them, his trademark katana went flying as he was spread out on the ground embarrassed. Things went from bad to worse when the sword fell point down on Sephiroth's back, impaling him.
However Cloud was not completely helpless, salvaging the material from Sephiroth he quickly cast Quake3 on the Dragon killing it after throwing grenade after grenade to weaken it.
He then went on to the village of Nieblehiem as the sole 1st class SOLDIER but didn't see Tifa anywhere...
--
"And that's how it happened, any questions?" Cloud finished the flashback with the rest of Avalanche giving sceptical looks, especially Tifa.
Barret put his non-gun hand up "Just one."
"What is it?"
"How fucking high were you when you saw all that shit?"
--
And that is why you don't hack flashbacks. If you do, you're more than likely to break the game. Don't find out the hard way.