From title to promos, Erra Bus doesn't really leave much of its premise to the imagination. If you have had any exposure to these, you must already know that it is about an elderly man, decidedly set in his rural ways, who chances to visit the Big City, and the hijinks that ensue. That this elderly man is played by so vital an elderly man as Dasari Narayana Rao, along with the fact that the film contains the improbably charming Vishnu and the winsome Catherine Tresa, along with Raghu Babu, Bramhanandam, Krishnudu and a score of others who have consistently delighted and entertained the Telugu ....