 Okay, got you. So like an EF0 is like a weak, low speed, and then EF5 is the most severe? Yes, you have that exactly right. Okay. So when the characters are describing the conditions for tornadoes in the movie, they use a lot of words like wind shear, updraft, mesocyclone, things that I was kind of Googling after I saw the movie. Can you describe the ingredients that make up a tornado and maybe define some of those words for us along the way?