he said he would beat me

Today during a conversation with my husband about a pool table he told me that he would beat me to death with a pool table stick.

His reason, “because I said no to letting him get a pool table”

he has never hit me and has not showed signs of physical aggression in over 7 years . . . but what he said is still kind of disturbing, especially because he said it while he was pissed off, it wasn’t during a “funny” conversation.

What do I do or say? We have 3 kids and have been married for 10 years, together for 12.