It’s also used for dramatic pause, suspense, or as a setup for a punchline, which may be the case for the title. Other punctuation is probably more appropriate, but oftentimes doesn’t convey the desired level of pause.

Why did the chicken cross the road? To get to the other side. Why did the chicken cross the road… To get to the other side.

David Carradine was found dead in Thailand from auto erotic asphyxiation.

David Carradine was found dead in Thailand… From auto erotic asphyxiation