The beauty and speciality of Indian classical music is its unplanned improvisation. This aspect of our music comes out at its best in a live concert. Because, the instant reaction of the audience is very inspiring for the musician. It is not unusual if two performing musicians have a brief tete-a-tete with each other and even with the audience during the concert. Wah! Kya Baat Hai (Wow! Great), is a phrase, used very commonly by almost every vocalist and instrumentalist for the accompanying Tabla player and vice versa. It is an expression of admiration and appreciation exclaimed by one musician to the other. Some anecdotes, moments of nostalgia, a bit of humour, brief explanation of the Raga that is being rendered, a few words in praise of the Guru, all these are ingredients that make an informal Indian classical music concert unforgettable and unique in the world.