Not necessarily. In a dire situation, what comes out of our mouths may be words to allay the threat. God, as our Lord, will govern the result of that. What we say has less of an impact on the circumstance than the fact that we are King's kids in jeopardy and in need of the Lord's intervention.
I highly doubt that in a sudden emergency w will stop and think about what to say or do, but as King's kids---God will work through us, imperfect response or not. He sees our hearts, and no one else---thank God.
I'm am sorry that you can't see anyone thinking in a dire situation. Is that an excuse for a lie?