London, April 12 (Inditop.com) Hollywood actor Robert Downey Jr. was left baffled on the sets of upcoming movie “Iron Man 2” when his co-star Mickey Rourke asked for pictures of his dead dogs to be held up on set during emotional scenes.

Downey Jr. has revived the superhero for an upcoming sequel, which will see his character pitched against villainous Whiplash, played by Rourke and he was fascinated by his co-star’s unusual acting technique, because Rourke used photographs of his beloved Chihuahuas to help him portray tearful moments, reports dailyexpress.co.uk.

“He would have someone holding pictures of recently deceased pets off camera to make him feel sad or whatever for a scene. It was all serious stuff. I’ve never seen anything like it,” he said.