'Speak In Tongues' in the Bible

Now I want you all to speak in tongues, but even more that you would prophesy. He who prophesies is greater than he who speaks in tongues, unless some one interprets, so that the church may be edified.

I thank God that I speak in tongues more than you all;

Therefore if the whole church assembles together and all speak in tongues, and outsiders or unbelievers enter, will they not say that you are mad?