Shocking moment stranger smashes bargoer around the head with piece of wood & punches another in sick unprovoked attack

THE hunt is on for a man who knocked a bargoer to the ground in a random, unprovoked attack on Saturday.

Surveillance footage showed the shocking moment Adam Mercado was brutally slammed to the floor outside City Tavern in Dallas, Texas.

WFAASecurity footage captured the moment a man was knocked to the ground in an unprovoked attack[/caption] Adam MercadoAdam Mercado suffered a concussion and had to go to the hospital following the attack[/caption]

The attack occurred...