Train

Weird dream where I feel like I finally understand something about the nature of reality/ unreality/ dream reality/ physics  ? Standing on the platform of a train station and jeryn is there and I think someone else is there and when there is some kind of signal the train starts moving and someone is on the train or off the train and this switches back and forth like I am learning how to be on or off the moving train at whim and others are showing me how they can dissipate onto the moving train and then dissipate off and be standing in the same place on the platform again