Mark Ruffalo once had an intense encounter with a fan who was using him to get to Tom Hiddleston.

The actor is currently promoting Marvel Studios' superhero flick Avengers: Infinity War, in which he reprises his role as Bruce Banner / Hulk, with the movie also featuring the likes of Robert Downey Jr., Chris Hemsworth, Scarlett Johansson, Benedict Cumberbatch, and Elizabeth Olsen.

While security is tight at all fan events, Mark has now shared that he once had an awkward meeting with an overzealous fan following a press conference in Russia for 2012 film The Avengers.

"I was in Russia, of all places, and the Russian security forces are basically just their KGB. They're very, very, very good at their jobs, to the point where they don't even let you go to the bathroom without one hand in the stall with you," he recalled during an appearance on The Late Late Show with James Corden on Wednesday night (25Apr18). "But they weren't very good at keeping a certain fan from throwing my publicist out of the way to get into the car with me to drive to the premiere. They didn't realise there was a fan and not my publicist sitting next to me."

Mark went on to explain that the woman was thrilled to have swerved past the security guards and landed in his car. But he was stunned when she then asked him to gift some artwork to his The Avengers co-star Tom, who portrays Thor's adoptive brother Loki.

"She's like, 'Oh my God, oh my God, I'm can't believe I'm here with you,'" the 50-year-old said, before adding: "She's like, 'Would you please give this (drawing) to Tom Hiddleston!' They love Tom Hiddleston in Russia. It was crazy."

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