I lined a gas tank today and spilled a bunch of the liner. Man, is that potent stuff. As I was turning the tank over so that it would coat evenly inside, I started laughing for no reason for about a minute. Then I'd have no desire to laugh for another minute. Next thing, I was laughing and giggling again. I also pretended to be dancing with the gas tank whenever people would look over at me (though I think that was just something stupid I'd have done anyway).