I was expecting my husband home for his dinner at 1pm .
My mother was at our house with me and we both saw my husband go past the kitchin window. I went to open the door and to my horror, he wasn't there.
My first thought was he has been killed and we had just seen his ghost. I didn't know what to do so you can imagine our relieve when a few minutes later he turned up alive and well.
Has anyone had any thing like that happen?

Can happen sometimes when people in question are alive. The only explanation (spiritual fora) is that it may have been an astral or mental body of his, one of the several which are categorized. I personally haven't the faintest idea what conditions cause such thing but you're certainly not the only one(s) who have experienced such thing.

What a strange world we live in.

Haha, you certainly can say that. My experience is that I understand only more of it the more I understand myself. Perhaps it's impossible during our lifetimes to get a logical explanation for this, but I do hope that if this happens more often, you'll find patterns in what you experience to find out if there's a logic in it. Truth and love don't stand in each others way b.t.w.