Hello Pralay Lahiri,
A Fantasmogoric exoerience indeed. Nearest I ever got to one in the open was perhaps about half to a Km, listening to a mating call coming closer & going past one in the foliage by the roadside at about 200 mts. Both instances that I often recall todate.
Now that you are back safe & sound, you have indeed profound thoughts to fall back on, for the rest of your life. It's all Jim Corbettian kinda stuff.
The tigress's behaviour? What can one say? Maybe just cussedness? Maybe a 'want' to show their Power over us human critters who have been a regular bally nuisance in their territory - as Sabyasachi Patra says?
Despite all that, I believe its a great picture. I'll have it on my desktop for quite some time.
A S Chandrashekaran