Conversation so far:
When was Rajinikanth hospitalized?
During the principal photography of Rana on 29 April 2011 he was hospitalized.
Why was Rajinikanth in the hospital?
Rajinikanth suffered a mild foodborne illness, which led to vomiting, dehydration, and exhaustion.
How long was Rajinikanth in the hospital?
Rajinikanth was treated at St. Isabel's Hospital for a day before being discharged.

Question: What did he do after he was released from the hospital?
Self-contained rewrite: What did Rajinikanth do after hospital release?