The late changes meant new tests had to be developed, he said, and created a number of unexpected obstacles that slowed the process.

The route was a logical one, but it furnished unexpected obstacles.

We had a couple of unexpected obstacles and it turned out that we needed the temporary workers for another two weeks.

These people are a huge hazard, creating unpredictable, unexpected obstacles.

We stood with bitter hearts staring at this unexpected obstacle.

The city's plans to sell hospitals have met unexpected obstacles.

The approach had been decided, and would not be modified now, unless it ran into unexpected obstacles.

"This is an unexpected obstacle," says he, aloud, but to himself.

"I see we're up against some unexpected obstacles," he said firmly.

Some investors who have put money into production have been surprised by unexpected obstacles.