I've always loved this video because of the random potential outcomes. At the end she inhales the air back in along with the bubble gum, and her breasts grow to the greatest size we'd seen them. But what if she coughed, instead? What if she exhaled all the air and inflated the bubble gum, but then coughed and spit it out? She'd have wound up totally flat-chested instead of super-stacked!
Now that's a good story hook!