Celebratory gunfire nearly hits crowd - GIF

[Toolmaker51]

Major Julian Hatcher collected same findings. Not attaining muzzle velocity but sufficient energy to injure seriously if not kill. Sometime back, at least one pregnant woman in Los Angeles died in this very manner during 4th of July or New Years Eve.

A 30gr .22 rimfire or bullet of light pistol cartridge will be less probable than most rifle projectiles. At least they are likely tumbling, unstable ballistically due lower speed in descent, compared to as-fired trajectory.