Normal reaction when arguing?

How normal do you think it is if you raise your voice during arguing to say that sometime next time to not be surprised if he smacks you? We've been together for almost 3 years, never happened bofore, but last time (few weeks ago) it got a little heated for a minute or two and and i raised my voice (not yelling tho, i would say it's a difference), and now that we were talking over texts it was said that i should not be surprised if he smacked me one time that happenens again. What do you think, because to me thats not normal?
Normal reaction when arguing?
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