Acting is no child's play and while most people assume that looking good and dancing around trees is all that an actor requires to do mostly, it is far from being true. From losing and gaining weight for a certain role, to performing their own stunts for certain movie scenes, some of the best actors work very hard to maintain the authenticity of a particular scene or a movie and here are five such actors who risked their lives to do the same.1. Amitabh Bachchan
The accident on the sets of his movie Coolie almost turned fatal, but thanks to the good fortune of this mega star and the millions of prayers showered on him by his loyal fans across the nation, he breathed a new lease of life. He was shooting for a sequence with Puneet Issar at Bangalore when an action scene was misjudged by the actor as he jumped and fell at the wrong point. He had to undergo multiple surgeries and was on bed for months before he became normal.2. Aamir Khan
In Ghulam, his character was required to run towards an incoming train at full speed. A crazy sequence was performed by the perfectionist himself who refused to have a body double for the shot. He later revealed that in the editing room when he saw the clip, he realised he was extremely close to the running train and was a close save from anything bad happening.3. Hrithik Roshan
The Greek God has done some kickass action in most of his movies but one such incident which left everyone gaping for breath was when he was shooting for one of the movies in the Krissh franchise when he was tied to a harness and was supposed to jump. Strangely, it came off and Hrithik came flying down, but luckily Hrithik was saved from the fall. After a few surgeries and post his recovery, the actor recently also shot a very dangerous stunt with co-star Tiger Shroff in Finland for War.4. Ajay Devgn
He is one actor who defies age by staying insanely fit and performing his own stunts ever since he stepped in Bollywood. He is the son of one of the biggest action directors of Bollywood, so this always came naturally to him. From balancing himself on two bikes for a Rohit Shetty action comedy to shooting in the Balkan mountains for Shivaay, Ajay has risked his life for ensuring that a scene remains authentic.5. Akshay Kumar
He's knows as Khiladi Kumar for a reason. The insanely fit actor is basically perfectionism packed in an energy ball. Akshay has always maintained the fact that he believes in performing his own stunts, no matter how risky they are. Being over 50 has not stopped this fit actor from continuing this tradition as well. He was last seen hanging from a helicopter for an action sequence in Sooryavanshi as the director Rohit Shetty was seen riding on a bike giving out instructions.