Sebastian saw Scott’s memory but usually he’d have to consciously be searching for memories of Allison but of course he wasn’t. It was a mistake. So doesn’t that mean that at that very moment when Scott was split seconds from death he was thinking of Allison? If Sebastian hadn’t been looking for anything in specific then it would have been mixed up memories of everyone. Stiles, Lydia, Kira, Malia, Liam. People who were there. But no. It was Allison. Scott McCall’s last thoughts would have been Allison Argent. He was thinking of his first love as he possibly took his last breath.