The trick is to extend yourself without snapping.

Imagine yourself a piece of freshly-made taffy, still warm and malleable. Imagine yourself being pulled at the sides. You find yourself stretched to thrice your size. You are folded in half, and then you are stretched again, and then you are much longer. Before you know it, you are all about the room, infecting everything with your sticky sweetness, leaving not a piece of furniture untouched. It's hard to imagine you started out so small, the size of two hands clasped.

The trick is to extend yourself while you are still warm. When you wait until you are hardened, at the faintest tug, you snap and shatter into smithereens.