If he suspected he was being looked over for injuries, he'd show Winter his hand to make it clear it's not a big deal, but he doesn't know what, exactly, triggered that little breakdown.

"Isn't that surprising, is it?" Magic has it's own set of rules, and he's not shocked to learn these entities can pull out more than people themselves might remember. "Memories go deeper than you'd think."

Souls have memories, after all. It isn't just synapses in the brain.