Okay... your husband has tunnel vision...
So I see 2 problems, one for each person.

1. Your husband should pay attention to his surroundings more, so that he doesn't end up hurting someone without noticing.

2. He was at work, so perhaps he had things he needed to get done. He is a department manager, so he could have been busy or had a lot on his mind. They tend to end up with a lot of responsibility.