Michelangelo, as usual, was playing with chemicals in Donatello's laboratory, while Donnie was busy with a new experiment... Leonardo and Raphael quarreled again and Raph was catching up with him, waving his fists... When Donatello finished he called the others to share his success with them... Mikey, slightly late, ran straight to them with a jar of the liquid that he had created and crashed into Leo with all his speed, spilling all the liquid on them and himself... They turned human...