That sounds like a mobile ore processing plant - it takes iron (or other) ore loaded on to its belt into its innerds and scrunches it up, then spoits out the refuse. Yum yum. Seriously - there are big fixed in place versions of those that are more common.

At least, that's what it sounds like. I am no expert though!

Awww - kitties dreaming of chasing leaves. How adorable. I have no idea why Tigger has gone like he has. He's a wierdo sometimes! He did get hit by a car once - maybe he thinks the thunder is a giant somethingmobile coming to get him? XD