Here's looking down the other end of Tirusulam to try and show you that I'm not the only one here. ;-) The deep pit in the middle of the platform is from where one emerges when exiting the subway.
The last and most important bit of information surrounding Tirusulam station is that it is only INR 6...that's almost less than one cent...from Egmore. It'll cost you 50X if you take an autorickshaw to travel the same distance. More if you take a taxi. He you don't have a lot of luggage, this is a great way to travel "light". ;-)