Complex sentence: Wally unwittingly finds himself as part of a group of Russian folk dancers, using the Matryoshka doll bomb in the act, unwittingly disarming the device seconds before it goes off, unwittingly blocking a poison dart from Boris and completely stealing the show with his improvised dancing.
Split into simpler sentences: Wally unwittingly finds himself as part of a group of Russian folk dancers. During the routine, he uses the Matryoshka doll bomb, disarms it seconds before it goes off, blocks a poison dart from Boris, and completely steals the show with his improvised dancing.