What are frogs

A man in a light suit stands at a game show podium with a score of $1400, then the scene cuts to a blue screen with white text stating "DURING THE SECOND PLAGUE THESE AMPHIBIANS CAME OUT OF THE WATER," followed by a wide shot of three contestants at their podiums with scores of $700, -$200, and $1400, then a close-up of the contestant with $700, and finally a still image of a frog holding a leaf as an umbrella in the rain with three question marks above its head.