Couple wakes up to find backyard pond drained by surprise sinkhole.

When Mark Korb woke up Sunday morning, he noticed the man-made pond on his property didn't look the way it did when he went to bed.

"This looks like the moon," said Korb, pointing at a sinkhole that caused a pond to drain onto his property.

A few years ago, Korb drained the pond with a pump, he said. The project took him seven days to complete.

The sinkhole emptied the pond much faster: "I would guess probably four to five hours for this whole area to drain," Korb said.

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