Once a sardaji and his sardar friends went to London looking for decent jobs. Since he couldn’t get one anywhere, he finally tried the zoo. When he asked for a job, the zookeeeper had only one for him. He said since the lion had been sick for a while, and the kids were missing him, he has to wear the lion’s disguise and keep the children amused.
So, one day when his parents co-incidentally happened to be visiting the zoo, sardarji forgot he was a lion in disguise and shouted"satsriyakal". In return came various replies from all other cages “jo bole so nihal!!”