Artica goes into attack mode too. She used to be afraid of the 'big' vacuum but then we got an electric broom with built in dustbuster (quite powerful little thing) and all of a sudden she didn't find it so intimidating. Smaller I guess. So now she even goes into attack mode with the 'big' vacuum. She tends to start in a play bow and then dives at the vacuum biting it and then scurrying backwards, barking all the while. Then she does the dive, bite, scurry all over again. It is funny as hell but when it is hot and you want to get it done as quick as possible I tend to send her out of the room.