Remember mission 11? When the Savior catches Nero with his arm, comes Credo. Sanctus stabs him with Yamato, and Credo falls down, but Dante catches him. Dante says: I don't know. I bet this kid (Nero) still got some life in him.
Nero takes Sanctus with his DB, but he didn't manage to catch him, and Sanctus appears next to Nero and impales Yamato into the DB. And the DB deactivates.
Only Yamato can do that to the DB, remember in mission 1, in the fight between Nero and Dante, when Nero is forced to reveal his DB to block Dante's Stinger, and Rebellion didn't manage to stab the DB, but Yamato did manage.
Nero takes Sanctus with his DB, but he didn't manage to catch him, and Sanctus appears next to Nero and impales Yamato into the DB. And the DB deactivates.
Only Yamato can do that to the DB, remember in mission 1, in the fight between Nero and Dante, when Nero is forced to reveal his DB to block Dante's Stinger, and Rebellion didn't manage to stab the DB, but Yamato did manage.