Drowning. Her memory of drowning is appropriate to the moment. He feels like his bad memories are pouring down his throat into his lungs. He's suffocating. He's had time to deal with this, but he's been pushed backwards into that moment, standing there in front of the oppressive presence of Invictus.

Then he sees the vision of another parent, hands bloody.

"I can't," he sobs. "My dad! I got separated from my dad. I can't leave yet. I have to find him!"

He tries to fight Catra's grip.