When Mona slapped Aamir with 'full Sardarni josh'

Mona Singh shares amusing behind-the-scenes anecdote from '3 Idiots'; reveals intense moment during delivery scene with Aamir Khan; in recent interview with Humans Of Bombay, Mona reflects on shooting memorable scene; Aamir Khan suggests she slap him for authenticity; Mona delivers forceful slap surprising Aamir's bodyguards.