Surviving in Minecraft: Pocket Edition, Episode 4 - Shining Light

In the latest episode of my journeys through the lands of Minecraft: PE, I begin fortifying my home from attacks by exploding cactus things, simply by using torches.

There's also a moment when I try to tickle a wolf with a feather in order to make it like me, and I begin journeying even further into the newly-discovered underground cave.

Plus: physics?