Rupa Goswami gives an example of ..
A man watching a drama ..
The man became so absorbed in the drama that when a leading character died , the man also died ..
So absorption in Radha Krishna nitya lila ( eternal pastimes ) is a process of shifting identity and becoming absorbed in a spiritual one , strongly identifying with all that’s going on in the eternal lilas of Radha Krishna , or any of Krishnas associates in the Vrndavana lila pastimes.