Plot hole: There's no way that Eddie and Nana left the flooded theater without getting a single drop of water on them. The water flooded up to the ceiling and there's no other way to exit besides the front doors, and Moon's secret exit, which also floods. They do not leave through either way.
Plot hole: After Moon gives his first pep talk about working harder than ever to the contestants, Eddie asks loudly "What about the hundred grand?!" in earshot of most of the contestants. The contestants (especially Johnny or Pete) would have heard that question and started asking their own. (00:24:50)
Answer: I think he escaped from the bear with his girlfriend, sped off very fast and the bears fell off the car.
You haven't read the question. Before it cuts to Meena's performance, the lead bear popped up from behind the car and presumably kidnapped them.