Significance of Aamir's hat in D3?

One thing I couldnt figure out the significance of Aamir's hat in D3. Why did he and even Salman promote D3 wearing that hat which simply had no contribution to the story except that Aamir's dad used to wear it. Vidya for Kahaani went around promoting it as a pregnant woman...it was supposed to be the biggest surprise as she wasnt pregnant at all in the movie. I was expecting something similar...the hat helping him escape or something...

Aamir ne sabko topi pehna diya aur kya chahiye😆

to hide the height difference between him & Kat😆

^^ coz usne sabko topi pehna di by saying the movie has a proper story and script!😆

Originally posted by: hasini009

to hide the height difference between him & Kat😆

considering it was a circus based movie, he could have atleast used it for the rabbit trick

Originally posted by: FullyFaltoo.

considering it was a circus based movie, he could have atleast used it for the rabbit trick

Originally posted by: FullyFaltoo.

^^ coz usne sabko topi pehna di by saying the movie has a proper story and script!😆

Originally posted by: HappyMelody

So it doesn't? 😕 I'm gonna watch it this week