Yo, God! —
P.T. Barnum once suggested that someone should invent a humbugometer, which would be a device to detect the presence of humbug. But the folks at Yo, God! have done Barnum one better. They've invented a God Detector
, to detect the presence of God. For example, say that you beseech God for a sign, and at that moment the phone rings. Is that really a sign from God, or is it just a coincidence? Whip out your Yo, God! detector, and you'll have the answer.