I agree with 2010, keep them both sweet, it sounds a bit like a "flare up" because of what happened. If I had a drill come through my wall unexpectedly, I might get stroppy too, but I'd calm down once I realised no harm done and that it was all going to get put right! And if the builder had the drill in his hand, then if he was waving his arms as he spoke, I guess he could point a drill at someone! No offence meant, but offence taken!