[The "Ba-" caught her attention and wanted to comment on it but his question caught her a little off-guard.]

Trains. I'm seeing trains. I was... once I was in a car that was hit by a train. I don't... I don't like trains.

[She really hadn't minded them before, but after being introduced to Cobb and his slight obsession with trains, not to mention this flood now, she didn't like them so much.

That and she feels like she's going absolutely mental.]