The better question is how did Clemenza know that Stracci was in the elevator since Clemenza was running up the steps at the time. FFC cued him. 
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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