travelling on the footboard.

The foot board of the local train is the best way to travel and view the city, especially if you are commuting on the harbour line. There are no parallel tracks.
It is like viewing the city as a longitudinal section, it tells a million stories of the past and the present, and simultaneously a projection of the future.
Fascinating parts of the journey are between,
Khar Station and Bandra - the railway colony, and a muslim burial ground, otherwise invisible.
Bandra and Mahim - slums and new high rises in the background, also the bridge over the Mithi, the BWSL can be seen as an elevation. There are also buildings with scissor slabs staircases where the mid landings meet.
King Circle and Wadala, where once again the train takes a bridge, you hover above the slums, its like living google earth, the dome of the VJTI building can be seen against new highrises and the BPT colony with its massive ESRs.