The 3 men had been drinking and were shooting the tiger with stones using slingshots. The slingshots were wrist-rockets, which are high velocity and considered a weapon in NY. Imagine all 3 of them nailing the tiger at once. The tiger jumped/clawed its way up the wall and got them. These drunk men then ran around yelling that a tiger was out. No one believed them. They didn't see a tiger because it was busy killing one of them. Then it went to the cafe, where it attacked another person. That was when 911 was called.