Re: Yes, it IS a game of chicken.
I favour the "Mark 3 Travel Machine". Look it up. Clue - "Exterminate". And they run on electricity so zero road tax rated.
I was going to mention what the War Machines in "The War Machines" were originally called (no relation, despite appearance), but it seems that they were only ever called "The War Machines". Apparently this time they weren't going to be coy. Wikipedia says that the basic story premise in 1966 was "what would happen if the recently built Post Office Tower somehow took over". The answer seems to be a modest army of terrifying giant mailboxes on tank tracks.