Listen to the sound clip Knocked from Epic Trolling Soundboard: Knocked Knocked This sound is from Epic Trolling Soundboard Epic Trolling Soundboard with the greatest trolling sounds ever including screaming, laughing, punching, buzzers, bells, social media, "I've fallen and I cant get up", "Leeroy Jenkins", "Bye Felicia", and many more. Go to the full soundboardwith more sound clips Search