 Well, you've got to be careful with a lot of stuff. Depending on the type of hybrid system you have, like with a Prius where you've got that stator ring in between the engine and transmission, you do not want to get that wet. It'll short, and it's not sealed up. As an example of one thing on a totally different kind of hybrid. If you've got an assist motor up on the top like a generator, then you don't have to worry about that getting wet. But those battery packs are supposed to be sealed.