Tim Cook on The Late Show on Tuesday.

Within the first few minutes of Tim Cook’s appearance on The Late Show, host Stephen Colbert was already threatening Apple’s CEO.

The two on Tuesday were discussing Apple’s new iPhone 6S, which goes on sale next week, when Colbert asked whether Apple had again changed the charger on the smartphone. Cook assured him the company had not.

“Good, because I will stab you in the neck with a fondue fork!” the late-night comic blurted out.

Colbert managed to throw in a few more jokes during the interview. When Cook described 3D Touch, which makes the iPhone 6S screen sensitive to different levels of pressure, Colbert asked: “If I hang up hard enough on someone, will it actually hit them on the other side?”

“We haven’t gotten there just yet,” Cook replied.

Later, when Colbert asked Siri, the iPhone’s digital voice assistant, “What should I ask Tim Cook?,” Siri offered: “Do me a favor, ask him when I’m going to get a raise.”

The show served as another helpful venue for Cook to pitch the latest iPhone, by far his company’s biggest money-maker. Getting attention for its September 25 launch date and keeping up sales of the device are critical for Apple’s success, so expect Cook and other Apple executives to be on the campaign trail for a while longer. Ahead of the Late Show visit in New York, Cook made an unannounced stop at the Apple Store on Fifth Avenue along with top Apple executive Eddy Cue.

Colbert shows off the new iPhone 6S, which Apple unveiled last week.

Aside from the jokes, Cook spoke about former CEO Steve Jobs, who he described as having an “uncanny ability to see around the corner. Cook also said he came out as gay last year to show support for others and hopefully prevent bullying and discrimination.

Colbert prodded Cook about rumors that Apple plans to build a self-driving car, something Uber CEO Travis Kalanick referenced during his visit to the show last week.

“So, he’s already given it away,” Colbert said. “You guys aren’t big on secrets, tell me about it. Come on. Cat’s out of the bag.”

Cook punted on that one.

After just one week of shows, Cook was Colbert’s third major tech CEO interview, following Tesla’s Elon Musk and Uber’s Kalanick.

During a Q&A with the audience before the show, Colbert was asked what other tech guest he would like to interview.

He jokingly answered Thomas Edison. Facebook CEO Mark Zuckerberg was suggested.

“Zuckerberg would be great,” Colbert said, though added he could bring on Jesse Eisenberg, who played Zuckerberg in “The Social Network” movie “and no one would know the difference.”

Excerpt from – 

On Late Show visit, Apple's Tim Cook talks iPhone, Siri, Jobs