I'm not questioning their decision making, since they've already proven that they have no idea what they're doing, but if you need to saw something, why turn into a grizzly bear? Are they known for their logging skill? Wouldn't it be better to turn into something with thumbs? You know, like a lobster. Or a pickle. Why make a chore out of it? They could have done Shape Of a Dog and Form of a Frozen Ice Codpiece and had a good time humping their way through that tube.