Former pro boxer Mario Oscar Melo -- who fought Michael Moorer for the WBO light heavyweight title in 1990 -- died Sunday after choking on dough during a croissant-eating contest in Argentina.
**WARNING -- THE VIDEO IS DISTURBING**
Video shows several men violently trying to dislodge the croissant from Melo's throat while on stage at the event in Buenos Aires, but to no avail. Melo was rushed to a nearby hospital but was declared dead on arrival.
Melo was 56.
Reports say Melo was on his 3rd croissant when he started to choke.