At station Z, the blind man boards the train. Usually, he can sit in his regular window seat. But sometimes, that seat is occupied, and he has to awkwardly find another seat. Bladderman immediately stands up in front of the blind man to offer him his seat.

The blind man listens to something on his smartphone, which he operates with a special device.
The blind man gets off at the same station as me. With sure strides, his cane in front of him, he finds his way down the platform, up the stairs, into the crowded station.

Then he is gone.