"What I learnt from Akshay is that sometimes odd things start happening while shooting... a prop falls down or someone's phone rings... there are a hundred distractions.
"Normally, in these cases, we cancel the shot because something goes wrong. But Akshay can improvise the moment and he incorporates that distraction or issue in the scene," the 30-year-old said here while promoting the film at an event.
Imran also recounted one such instance.
"There's a scene where he is sitting and writing and I come in. He looks up and speaks to me, but then (when we were shooting it), the pen fell down. He didn't do anything, and just gestured me with his eyes to pick it up. I picked up the pen, saw it and handed it to him and kept the dialogues running," Imran said.
"This is (also) in the movie," he added.
Directed by Milan Luthria, "Once Upon A Time In Mumbaai Dobara" is a period gangster film and also stars Sonakshi Sinha.
A sequel to Balaji Motion Pictures' 2010 hit "Once Upon A Time in Mumbaai", the movie hits the theatres Aug 15.