Three people on a road trip,then pick up a forth person

  Three people are on a road trip. They found someone were asked for hitchhike. Then they picked it up.
  The man very thanks for them. They said:" It's fine." However, the following dialogue let him feel afraid.

  The driver said, "let us rock tomorrow!"

  The man who was sitting beside the driver said: "hum, I'm looking forward to tomorrow's show." A woman sitting next to him just pulled out a gun and picked up a few times: "Jack go to control gate tomorrow, and we will go for take money!""Oh yeah!"

  The hitchhiker thought: Oh my god, they are going to rob a bank?? I have to leave them."please, I arrive.” The man said. 

  "Oh, ok. I let you go." The woman said.