1. It was like the Black Hole of Calcutta on the underground this morning.

2. Where was the "Black Hole of Calcutta?"

3. It was like the black hole of Calcutta down at my factory.

4. Like the Black Hole of Calcutta, but a lot wetter, came the reply.

5. It was like the black hole of Calcutta on wheels.

6. “It feels like being swallowed by the Earth, ” says photographer Carsten Peter of the Black Hole of Calcutta in Claustral Canyon.