Olivia frowns as he stands to pace, but she can't guess what's upsetting him, so she just waits, patient and silent, until he sits back down to continue the conversation. At least the question's one she expected, and she had an answer more or less worked out in her head already.

"I was treated with a drug called Cortexiphan when I was a child. A lot of the children treated with it developed... abilities. The first time I crossed over, it was with three other Cortexiphan subjects helping me. It's harder when it's just me. This is the first time I've managed to cross over on my own for more than a couple minutes."

She grimaces, glancing out the holographic window just for something to look at that's not him - not that it matters, when he's not looking at her. "I don't know why here. My universe is connected with the other, because of... some things that happened a long time ago. This one isn't. Or it shouldn't be." She laughs a little bitterly, and shakes her head. "I don't know. I'm not a scientist, I just work with them."