Aaron Hernandez Bloody Fist 911 Call -- 'He's Losing a Lot of Blood'

Aaron Hernandez Bloody Fist 911 Call 'He's Losing a Lot of Blood'

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TMZ has obtained the 911 call placed by Aaron Hernandez' fiancee moments after the NFL star punched his fist through a window in their house ... and bled all over the place.

As we reported, the incident occurred in April at the couple's Hermosa Beach rental house in L.A.

We're told Hernandez flared up because his fiancee -- Shayanna Jenkins -- tried to pull the plug on a party he was throwing with his friends.

We're told Jenkins called 911 in a last ditch effort to break up the party.