Hi,
Dreams are rarely boring - I think that's why I love them so much.
Do you think there might be any significance in the names of things in your dream? For example "bulldozer" and "top loader"? Also, was the bulldozer yellow? If so, what do you associate with the color yellow? The fact that the equipment made repeated attempts to attack you might suggest that there is something that hasn't been dealt with that is coming back to haunt you - something as powerful as a "dozing bull" - or something that is causing you to feel as if the ground is being ripped out from under you.
Just a couple of thoughts. And while they sound none too cheery, it's good to remember that dreams often symbolize that way we feel and are not necessarily omens of what is about to come to pass.