World Cinema A ‘Good Chunk’ Of TMNT: Mutant Mayhem Wasn’t In The Script The way the voice overs were recorded for TMNT: Mutant Mayhem lead to plenty of improvisation of lines not in the script. SHARE ON: admin — August 9, 2023 The way the voice overs were recorded for TMNT: Mutant Mayhem lead to plenty of improvisation of lines not in the script.