The first big hurdle is believing You can actually do it.

For now, the biggest hurdle is working with variables of human behavior.

The big hurdle for us is the left guard spot.

Of course, the biggest hurdle is trying to identify the right place to start!

That step could remove the last big hurdle to the $22 billion deal.

The big hurdle was doing what he had learned in games.

The biggest hurdle for women may be the cost of new equipment.

Perhaps their biggest hurdle is simply the lack of them.

The biggest hurdle for the project was management of traffic at site.

In fact, a nearly complete lack of information on the species was the biggest hurdle.