Prabhu Dheva was also impressed with Ajay Devgns dedication as he mentioned, For this sequence, Ajay sir underwent a lot of training as the posture and the technique had to be correct and to the mark. He used to even exercise on the sets before the sequence and was on a strict diet. <BR><BR><br><p class=clear>&nbsp;</p><amp-img width=1.33 height=1 layout=responsive src=https://images.bollywoodhungama.com/img/feature/14/dec/actionj3b.jpg></amp-img><BR><BR><br><p class=clear>&nbsp;</p>Recollecting an incident, Prabhu revealed, One day he was down with fever and in spite of that he insisted on working out and shooting for the fight sequence which was extremely difficult.<br><p class=clear>&nbsp;</p>Produced by Gordhan Tanwani and Eros International, Action Jackson also stars Sonakshi Sinha, Yami Gautam, Manasvi Mamgai, Kunaal Roy Kapur among others and is slated to release on December 5.