My [29F] husband [31M] had a violent tantrum after he lost his football bet

I married the love of my life 4 years ago after dating for 3 years and he's been great to me at first. We both love sports and want our 5 year old son to be involved in a sport some day, at least for recreation. Over the past year though, he's been gambling on football and it worries me. He's won some times and lost some times but we still had enough money to cover expenses either way.

A few days ago, he placed a $1500 bet on the Detroit lions making it to the super bowl. I was mortified as we both pool the money we earned from our jobs into a joint account and he didn't consult this. He just told me everything will be fine and that my negativity could affect this.

I tried to get him to withdraw the bet or at least reduce it to a $100 bet but he insisted that if I stay positive, then we would make a lot more money. Ultimately, the Detroit lions lost and that's when he had a violent tantrum and blamed their loss on me.

He threw stuff at me, screamed at me so loud that our son woke up, and yelled that I owed him $1500 and that if I don't give him that money in a few day he will scream and yell until it happens. Right now, he's at his friend's house and I'm mortified.

What do I do about this and how do I calm him down?