'22 Jump Street': Channing Tatum, Jonah Hill Talk Movie Improv

— -- Channing Tatum and Jonah Hill are back at it. Today, they’ll hit screens as stars of “22 Jump Street,” the sequel to their movie remake of the classic TV show, “21 Jump Street.”

As they geared up for the big premiere, Tatum and Hill made a pit stop at the Pocono International Raceway, where they served as grand marshals at the NASCAR Sprint Cup Series.

Jimmie Johnson taught them racing basics, then Danica Patrick put them through their paces.

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Tatum teased Hill about his reaction to the hair-raising car ride, displaying the brotherly dynamic that has made them box office gold.

When ABC News’ Rachel Smith asked them how much of what moviegoers saw was off the cuff, Tatum replied: “The first day of filming, the first scene, we had 60 pages of improv.”

Added Hill: “The script supervisor has a semi-breakdown every single day, but for us it is fun.”

The two then engaged in a comedic cops face-off. Smith posed a lightning round of questions.

“Who is the better driver?” she asked.

Both said Tatum was.

“Who would be the frat boy?” she asked.

Tatum answered, “Hill,” but Hill believed they both were.

And as for who would be the cleaner roommate, both answered Hill would be.

Tatum also chatted with Smith about “Magic Mike 2.”

Hill joked that it would deliver a “magic element,” in which the characters would attend a magic school, a la Hogwarts School of Witchcraft and Wizardry.

When Hill pressed Tatum to confirm that, he said: “I don’t want to give any spoiler alerts.”