I think saf makes a lot of sense. I would see it as an assault, rather than abuse.
I have been in an abusive relationship, there were a incidents of violence, but it was the mind games, the fear of violence and emotional abuse that meant I began to believe it was my fault and so stayed in the relationship, trying to make it better. Of course you can't.
This one off incident, whilst serious and unacceptable, is not the same thing.
I have also thrown something at my husband, once. Foruntately, it was only an empty sports bag, which he caught and no damage was done. The point is however, that I'd lost control and reacted in a manner totally unlike me. We were both shocked by what happened and discussed it in great depth.
We talked and talked and talked. We actually learnt how to communicate a whole lot better than we ever had before. That helps a great deal in avoiding ever getting to that point again.
If we do row, that incident immediately comes back into my mind and is a warning sign. I have found many ways of now diffusing my anger and frustration, even if it's just leaving the room.
At the time this happened, I was recovering from a ECS, with a tiny baby and just all kinds of minor health problems. It's not an excuse, it was about understanding that certain circumstances are capable of making me behave in such an outrageous way. I never knew that about myself before.