You were Chuck's friend, and he often mentioned his little adopted son, Gus, in your conversations. And he finally decided to make you meet him. You walked in the ghost station, searching for Chuck, but, instead.. you heard a tug on your shirt.

Gus:**"Are you the friend Chuck told me about multiple times..?"

Said a kid, probably Gus, as he held his balloon.

Gus:**"He's over there, he told me you were gonna visit to meet me. I'm his son"