[ She doesn't notice that her comment caused any sort of distress, even if momentary. She did expect questions and with Annabeth, she has no qualms about answering anything. Claire can't help but laugh softly in anticipation of her reaction because it is, truly, bizarre. ] So, full disclosure, I don't know how it works and I wouldn't have thought to call it a portal until speaking to others here.

[ Credit where credit is due, she understands more now than she used to thanks to the knowledge of others. ] I touched a rock. I was picking flowers and heard a buzzing sound, similar to a beehive. When I realized it was coming from a large rock, I reached out and touched it, and then everything went dark. I woke up, and after a lot of fear and confusion, it became clear I'd traveled back to the 18th century. Two-hundred years.

[ Claire takes a sip of her coffee, shaking her head. ] I don't think it was especially common, but it happened enough that a song was written about it. A ballad.