3. It differs from a riot, it not being premeditated; for if any persons meet together upon any lawful or innocent occasion, and happen on a sudden to engage in fighting, they are not guilty of a riot but an affray only; and in that case none are guilty except those actually engaged in it. Hawk. b. 1, c. 65, s. 3 ; 4 Bl. Com. 146; 1 Russell, 271.