Audio problem: When Leonardo stops Daimyo, the words "Hold it, Bucko" are heard, but Leonardo is not seen to be speaking at all. (01:15:30)
Audio problem: When Walker confronts the Turtles in the Daimyo's courtyard, he says "My God, who's your tailor?" One of the Turtles says "We're naked." but none of the Turtles' mouths move. (01:17:45)
Audio problem: The Turtles reach Walker's chambers. Seeing that he's escaping, one of them yells "C'mon, Mikey!" but nobody's lips are moving. (01:20:50)
Audio problem: Michelangelo runs inside the burning hut yelling "Here I go!" with his mouth closed. (00:46:10)
Audio problem: Raph quotes Terminator just before he jumps in the waste disposal chute, but the animatronic's lips don't move. (00:34:00)
Audio problem: April is lowering the cage where a random doppelganger of Elias Koteas appeared in Feudal Japan. She says "I know I am gonna regret this", but her lips are not moving. A moment later she shouts "Well, come on!" and again there's no articulation of sounds from her mouth. (00:33:00)
Audio problem: Battling the Norinaga soldiers in the castle, Donatello parries several katana strokes using his wooden bo, which causes sharp metallic sounds every time. (00:22:50)
Audio problem: April's walkman keeps playing for a while spreading in the air the suave notes of The Barrio Boyzz's "Conga" even when the batteries already came out on the first strike. (00:15:40)
Answer: I don't belive it has a set name, other than giggle or laughter it is just a generic sound. Much like the Wilhelm, which I think fans named after hearing it in a lot of movies.
NoWhereMan
Ben Burtt, a sound designer who used the scream, is the one credited for naming it the Wilhelm scream. It's named after the character Private Wilhelm in the film "The Charge at Feather River" when the scream is dubbed in after he's shot.
Bishop73