Where’s Iron Man when you need him?

Robert Downey Jr. shared the awkward experience of almost coming to blows with a Hollywood exec in the green room of “The Howard Stern Show” just moments after it took place, saying the industry exec attempted to belittle him while asking Downey Jr. to move away from the Sirius XM monitors.

“I was just standing out there … standing in front of the TV screen when this little nebbish bigwig says, ‘Out of the way,'” Downey, 54, shared.

When the actor informed the unnamed exec that his group was taking in the show before going on-air, the executive replied, “Who the f—k are you?”

While Downey considered getting physical, admitting he thought he was “going to have to light this guy up,” he chose to brush off the encounter instead, chalking it up to the “bigwig’s” ego. According to the Oscar-nominated actor, execs of a “certain status” in Hollywood “are the master of their environment,” and typically take issue when they can’t assert control over others.

The Marvel mainstay also shared his thoughts on Martin Scorsese’s recent take that superhero movies shouldn’t be considered “cinema,” admitting there is something to be said for “genre movies … denigrating the art form of cinema.”

However, for Downey, to say the blockbuster films aren’t cinema “would be like saying Howard Stern isn’t radio.” Ultimately, he feels the director of “The Irishman” has a right to share his opinion, even if the masses disagree.

“It’s his opinion. I appreciate his opinion because I think it’s like anything. We need all of the different perspectives so we can come to center and move on.”