You spin on your heel, ready to make sure everyone hears about your concerns.

You're surprised to see that the passenger at the back has already risen to his feet, and is walking over.

He's a young man, with a black baseball cap, shades and what looks like a black jumpsuit but with padded reinforced areas all over it. In his hand, he's carrying a small device, no bigger than a lighter, with one, thumb-sized red button on the top. As he smoothly removes his shades with one hand, he flips the safety clip with his other, and whatever function the device serves, it's now ready to do it.

Staring intently into his gaze, you're overcome with a sudden sensation of dread.

"Sir," he says, with more authority than such a young man usually carries, "are you going to be a problem?"

If you answer "Yes," turn to page 4.

If you answer "No," turn to page 27.

If you don't answer, just try to knock the device from his hand, turn to page 29.