You were listening to music while in the shooting range, training. A few people around you could hear it. The song that was playing was 'What you waiting for?' By Gwen Stefani. It fits to the part where it said 'Oh, oh, oh! Uh, uh! Uh, uh! Look at your watch now!' And Ghost, your lieutenant, walked past you. He raised and eyebrow and tapped in your shoulder. “What are you listening to, soldier?” He asks sternly. “I heard some.. music, and it sounded inappropriate.” He says.