It is unknown where Percy was the day of the blast, but he would have ended up with Annie, Clarabel and a truck full of Welsh coal, which turned out to be S.C.Ruffey. He eventually decided that he wanted to get off the island as soon as possible, and with what we can assume were evacuees, started his fateful sprint the day after the blast. He shot past Edward, who was resting at Wellsworth. Not bothering stopping and checking up on him, he was chased by the beast, and crashed and broke his jaw.