Black Widow uses "phrases" in Marvel movies to calm the Hulk into transforming back into Bruce Banner. But in the comics it doesn't work.
"The sun is setting too low, the sun is setting," is all that Black widow tells Hulk at the beginning of Avengers: Age of Ultron (2015) to calm him down. It worked so well, he even uses them Thor in Ragnarok (2017), but those words have no effect in the comics.
The relationship between Black Widow and Hulk is unique in the Marvel Cinematic Universe. While their romance was never formalized, it was clear that they had feelings for each other. Those feelings made Natasha the only one who could calm the Hulk, but her phrases that look like a "lullaby" don't work at all in the comics.
The Master has returned.
The Marvel comic Teacher # 1 by Peter David, German Peralta, Dale Keown, Jesus Aburtov and Jason Keith is the first part of a new five-issue series detailing the origins of The Master. An evil version of the Hulk that exists in an alternate future where Earth was destroyed by nuclear bombs. Maestro has the strength of the Hulk and the intelligence of Bruce Banner, a combination that allows him to easily take over what's left of Earth. While Maestro was created by Peter david in 1992 in The Incredible Hulk: Future Imperfect # 1, his exact backstory has never been revealed, until now.
The comic begins with the Hulk living his best life, but some strange occurrences start to make him suspicious, and that drives him to anger. Naturally, the Avengers don't want the Hulk to be angry. They try to calm him down and Black Widow pulls out the old lullaby trick. "The sun is getting very low ..." he says. Unfortunately, the Hulk has no idea what he's talking about.
So he ends up taking down the entire team with a single clap before breaking free from what turned out to be a simulation.
As in Thor: Ragnarok, the lullaby in Teacher # 1 it's actually only used as a joke, and also very funny. Still, it's always good to see that comics reference movies and vice versa.
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