This happened in a panchabrahma kshetra called Lord Bheeshmeswara in Andhra Pradesh. Leaving this sthoola sareera while doing Shiva Puja is the only thing one could ask for. What more we want. This does not happen to everyone – only to the most blessed ones. Our Namaskaram to the shivacharyar who became one with Parameswara.
Aum Nama Shivaya!