What does "I'll be down" mean in English for Spanish?

In English for Spanish, "I'll be down" means:

bajaré

Listen to "I'll be down": (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
• English for Spanish 2, Level 1, Scene 1
• English for Spanish 3, Level 2, Scene 6