What does "Okay. I'll be down in a minute." mean in English for Spanish?

In English for Spanish, "Okay. I'll be down in a minute." means:

Bueno. Bajaré en un minuto.

Listen to "Okay. I'll be down in a minute.": (If you have an HTML5 enabled browser, you can listen to the native audio below)

This is a phrase that is used in the GamesForLanguage English for Spanish Language Game in the following scenes:

• English for Spanish 3, Level 2, Scene 4