Your brother tells you that he met a really famous celebrity. You say this because you're surprised that he met someone so famous.
No way! Get out of here!
You open your refrigerator to look for a snack. It smells bad. You comment on it to your roommate.
You're training a new employee in your department at work. You've showed her how to do a task. Now you're going to let her try it by herself. You say this before you leave.
Your friend comes over to your house for a party but doesn't drink anything. You wonder if she might be pregnant. A few weeks later, she tells you that she is. You say this in excitement.