The scene was engineered that way to show us Vincent's rise in the family. Now he's in charge of Michael's personal safety. Neri probably was "running interference" for them--guarding the rear with his lupara in case Zasa had people on the ground to kill survivors.
Ntra la porta tua lu sangu � sparsu,
E nun me mporta si ce muoru accisu...
E s'iddu muoru e vaju mparadisu
Si nun ce truovo a ttia, mancu ce trasu.
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