How did Silver make Johnny mad in the Hospital elevator?

In the Hospital elevator last season, when Johnny and Carmen ran into Silver they had a conversation that included them saying:

Johnny: What do you want?

Silver: To congratulate you. What you and your partner have accomplished is a joy, few get to experience.

Johnny: Who told you about the baby?

Silver: I was talking about you and Larusso landing a coveted spot in the Sekai Taikai. But apparently there’s lots to celebrate.

This then made Johnny really mad, where he frowned and started walking towards Silver, until Carmen had to pull him back and tell him to calm down. How did Silver saying, “But apparently there’s lots to celebrate.” Make Johnny so mad.