Mark and I took the train from a little station in Powai into Mumbai central which was quite an adventure for us.  We bought tickets in a station that seemed like it was in a real slum area, but all kinds of people were walking in and out getting their tickets as if it were perfectly okay.  Interesting to note was that there were separate coaches for men and women so I hopped onto the ladies one and Mark onto the men's one next to me; we could see each other from the coach, and off we went.  It was amazing being on the train with all these Indian women dressed in their beautiful attire on their way to wherever. It was a 40min train journey and we got to see quite a lot of what I don't think we would see in a taxi.  It made me very grateful for what I have in life! The slums and piles of litter everywhere were very, very sad .
On the way back, we went in peak hour traffic, and we were lucky enough to get into the train at the start of the journey as boy were people crammed in.  They were literally pushed onto the train else they would never have gotten off. I have never seen anything like it.  Mark and I both ended up in a men's coach, but were assured it would be fine.  Again lots of curious stares.  Getting off was a another whole adventure.  We got into the "slip stream" and were all pushed off by those behind us who were also wanting to get off!  Wow!