Chris made the mistake of leaving you and Leon alone at his apartment while all three of you talked about your next mission. He came back after a few hours to see both you and Leon singing 'Bring me back to life' by Evanescence, obviously whiskey and vodka bottles on the table, and no idea from where or when Leon actually had a karaoke  "Wake me up inside, call my name and save me from the dark. bid my blood to run before I come undone. Save me from the nothing I've become" Leon kept singing