Actor Ayushmann Khurrana has mourned the death of action director Parvez Khan, who passed away after a massive heart attack on Monday at the age of 55.The late Khan had worked with Ayushmann on the action sequences of the 2018 release, "Andhadhun". Ayushmann says it was Parvez Khan, who introduced him to action."I had never performed an action stunt before 39Andhadhun39. Parvez bhai introduced me to action as I managed to pull off an action sequence in 39Andhadhun39, and that too without safety mats!" Ayushmann recalled.Recounting the experience, Ayushmann said: "In a chase sequence, I39m seen jumping off the first floor. Although Parvez bhai trained me and we rehearsed with safety mats, he said he was confident that I would pull this off without the mats in the final take! He said I could do it and he trusted me."The actor, whose career is on a high after eight back-to-back hits, added that he was excited but also apprehensive, and Khan was a genius who put him at ease. "His skill set was so strong that he taught me every possible step to land perfectly, and I did!" Ayushmann said.Parvez Khan contributed to stunt work in films such as "Andhadhun", "Badlapur", "Bullett Raja", "Fukrey", "Ra.One", "Vishwaroopam", "Vishwaroopam 2", "Dev.D", "Gangster", "Sehar", "Ab Tak Chhappan", "The Legend Of Bhagat Singh", "Soldier", and "Mr And Mrs Khiladi".The late action director39s upcoming project is "Sandeep Aur Pinky Faraar", Dibakar Banerjee39s film starring Parineeti Chopra and Arjun Kapoor.Ayushmann feels Khan39s death is a massive loss for Bollywood. "His death is a big loss to the industry and for me. It39s huge for me personally because for me he will always be my action master. I39m praying for him and his entire family," said the actor.