You can laugh your way through his comedies, but director Rohit Shetty says it took a 19-day, mindboggling session for him and his team to crack the climax of his new film "All The Best - Fun Begins" that releases Friday.

"There is a common perception that scripting a comedy is the easiest thing to do, but it is the most difficult thing, " Shetty, who was here to promote the film, told in an interview.

"We had to write close to 15 drafts for the 'All The Best' climax and it took us around 19 days to write it and figure out what the end should be because it is very dialogue-oriented."

Produced by Ajay Devgn, the cast includes him along with Bipasha Basu, Sanjay Dutt, Fardeen Khan and Mugdha Godse.

"The climax is very unpredictable...but in the sense that it is not something new or something different or never seen. At the same time, it doesn't even end the way audiences would be thinking...it takes a turn and that is the best part of the film."

"The whole strategy behind comedies is very easy. If I am laughing in the scripting room with my team that means the audiences are also going to laugh. It's a very simple theory, but it's very difficult to implement, " he explained.

Comedies also seem to have taken the 35-year-old by storm, as he has decided to stick to the genre. He has already made successful lighthearted entertainers like "Golmaal", "Sunday" and "Golmaal Returns".

"I am not shifting my genre (comedy) at least for the coming five years because people want me to do films like that and they are paying me for it; so why should I change? I don't want to disappoint my audiences by doing something else, " he said.

"All The Best" is releasing with two other big budget movies, "Blue" and "Main Aurr Mrs Khanna", but Shetty is unperturbed by the competition.

"We will be affecting each other's business in the first week for sure, but content will matter and the film that is good will run till the second week. Nobody is thinking about that. The real weekend will start Oct 19 onwards, " he said.

Shetty is otherwise confident of his film.

"I have a gut feeling that this one will work for sure. I don't know how big it will be or what business it will do, but what I really know is once the audiences come out of the theatre, they'll definitely have a smile on their faces, " he said.

Rumours are also rife about a sequel to "All The Best".

Shetty said: "It's too early to say. We are just waiting to see how it goes and how the audience takes to it. And how they react after watching the film. For that matter I also keep on visiting the internet and reading what they want."

And what about the third instalment in the "Golmaal" franchise?

"We have cracked the story, but we need to write the screenplay, the situations and the dialogues. It's a long procedure that will take around six months. We'll start filming may be by mid-next year, " he said.