Catcher moving before the pitcher moves first?


I was at the field the other day and I was watching a team intentionally walk a batter and the catcher jumped out of the catcher’s box before the pitcher started any movement to home plate and the umpire called a balk…is this a balk? what should’ve happened?

I think someone answered this in a different section already, but yes it is a balk. The catcher has to wait for the pitcher to start his motion.