Chekov's excavator

On Halloween night, in the dark, a truck dropped off an excavator next door. Our neighbor on that side, who we'd loved living next too ever since we moved in here in 2005, moved out in July after selling to a developer, so we've been waiting with some trepidation to see what... develops. Well, now we're even more on edge because there's this multi-ton machine just outside our dining room windows looking primed to do some smashing. When is it going to swing into action? We have no idea!