Yeah, dissociation... My vision gets hazy and 'unreal'. Like everything is far away. Sometimes I'll hear buzzing or simply not understand the words I'm hearing. And I usually don't realize it happened until a few hours later.
It happens a lot less with T than it did with previousT. He has always spotted it when it happened too, she never did. Makes a world of a difference when your T understands what's happening, even if they can't actually pull you out of it.