In what should have been a great first legal 4/20 celebration, the festivities at Denver’s Civic Center Park suddenly turned into a potentially deadly event. The two shooters who are thought to be in a gang started firing into the crowd, causing hysteria. A man and a woman both got hit by bullets in their legs and a third was grazed. There is no information on the shooters. Who invited the haters to the party? Check out the video when the shots were fired after the jump.