There is a lot to tell about Mumbai, its called as dream land, because things happen at a lighting speed in Mumbai, people are working hard all the time to reach on to the next level of there profession, money looks even more beautiful there.
Things you wont do in Mumbai[ at-least most of you], because you wont get free time to do so, but you should do are as follows:
1] Listen to music.
4] Play with a pet.
5] Take a Nap.
Wish you happy life!!!