This is strange because Swim never experienced something like this. Instead of being teleported into his past (as usually occurs with Salvia), Swim got glimpses of his future! And it was not pleasant at all. Really. He saw himself decades ahead from now, in the same house, aged, alone and with parents long time dead. It seemed so real. More strangely, the Swim of the future was nostalgic for the present days (the same nostalgia Swim has when Salvia takes him back in time).
Overall the experience was disturbing, leaving Swim not wanting to touch Salvia for a while.