Do you like this new form of alternative energy?

As a geography major, I've done extensive research on alternative energy. I have a new idea called "rain power." I think we should instill rooftop generators incorporated into rainwater collection. Rain falls diagonally rather than straight. Therefore, the terminal velocity from the raindrops could spin these turbines and generate electricity. Monsoon Season in Asia would be fantastic for producing it. The same is true regarding hurricane season in the Gulf Coast and rainy season in the Pacific Northwest. What do you think? Do we have the brain power to harness rain power?