Object: Two balloons

Good morning, boys and girls. I have with me a balloon. I'm going to try to blow it up. There. I knew I could do it. It looks like a balloon now, doesn't it? Unfortunately if I let go of it, what will happen? (Let go of it. The spurt, sizzle, flop will at least wake everyone up.) When I let go, what happened? That's right! It jumped out of my hand. Soared for a moment. Then went flat and fe…