Re: is it abuse...
If he does it with everybody it sounds like he is just plain rude. He will ne somebodyto say to him firmly but very politly something along the lines of "I havent finished what i have to say" and tehn to continue. or to tell him that if does not wish to listen I will spend my time more constructively doing something else.
there is no excuse for rudeness, it doesnt matter what grade does it.
and also it shouldnt be put up with.
If people feel they cannot stand up to this manager get together and either put in a complaint.
the other way around it is to turn the situation into a joke.
observe the way he acts, mention it to your co-workers who'll add their bit and eventually he'll it'll get back to him or someone higher than him.
Its an underhand method but seems to work.
anyway , dont let it get to you.......... you'll come across lots of wierd and wonderful people throughout your life and you just have to figure out ways to deal with them.