Listen to the sound clip Laughing 3 from Dr. Robotnik Sounds: Sonic Adventure: Laughing 3 Laughing 3 This sound is from Dr. Robotnik Sounds: Sonic Adventure Soundboard for Dr. Robotnik, aka Dr. Eggman of Sonic Adventure. Contains over 115 sounds including anger, threats, and more. Go to the full soundboardwith more sound clips Search