Mark Ruffalo On 'Avengers,' Following In Ed Norton's Footsteps & Not Being 'Well-Endowed'

A number of journalists paid a visit to the set of "The Avengers" when the movie was being filmed and some very interesting tidbits are coming out of their interviews with the cast of the film.

While HuffPost Entertainment already covered the secrecy and sneak peaks journalists at the event witnessed, Slashfilm snagged one interesting and previously overlooked part of the chat.

In the middle of a roundtable with journalists, Mark Ruffalo, who plays the Hulk in "The Avengers," had an odd way of describing his frustrations on set. When asked about filming in motion capture suits, Ruffalo opted for some real talk.

"Yes, and that was my first day and that was a miserable day," he said. "It was smoky, it was hell and I felt really uncomfortable. I’m not well-endowed, and those suits don’t really show you off in the most…"

The affable overshare was followed by a discussion of Ruffalo's co-star Scarlett Johansson, who told reporters she wasn't wearing underwear on the shoot. "They spray paint her suit on in the morning," Ruffalo said. "But she looks good in it."

Other highlights from the session include a discussion of Ruffalo's anxiety about taking on the role. Comic book fanboys are a notoriously passionate group and Ruffalo is the only star in the ensemble cast who hasn't already played his character (Robert Downey Jr., for example, has already been Iron Man -- twice).

"I made a mistake of going online one day and reading the fan-boys’ take on me playing the Hulk," Ruffalo said. "It was not encouraging."

The Hulk was previously played by Eric Bana (in "Hulk") and Edward Norton (in "The Incredible Hulk").

Publicists for "The Avengers" were eager to keep much of the film under wraps. As HuffPost found out, every actor was accompanied by a representative of the film who would direct the stars as to which questions they could or could not answer. Ruffalo endearingly referred to himself as the "loose canon of the Marvel family."

For more on the story, including how director Joss Whedon worked with each actor, head over to Slashfilm. "Avengers" assemble in theaters May 4.

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