Actor Kunal Kapoor has drawn a comparison between superstar Shah Rukh Khan and the latter's superhero character G.One in "RA.One" as he is amazed at SRK's energy levels.

"I think his character G.One is actually semi-autobiographical, " said Kunal, who is working with Shah Rukh in "Don - The Chase Continues".

"While we need sleep and food, he is actually a robot and all he has to do is plug himself in or change his batteries and he is good to go again!" he added.