Gun are easy. Guns don't require the determination and physicality of a knife attack. If you're assaulted by some idiot with a gun feel lucky. At least you weren't attacked with a knife.
America is turning into a knife culture by virtue of immigration and gun laws.
If you're attacked by a felon that has spent time in a State or Federal Penitentiary then the odds are that the attack will be particularly vicious. A favorite tactic is the "prison bum rush".
The bad guy attempts to attack his target unseen. He tries to knock his victim to the ground. Gain mount (meaning that he's on top of his prey) possibly using his knees to pin the vics arms down, uses one hand to force the head to the side and then repeatedly stabs the victim in the neck...not stopping until arterial spray is achieved.
Death is almost a certainty if the assailant is physically stronger, practiced in the technique and catches the victim unaware.
A modification of this attack has two people assaulting and one person holding the victim and the other stabbing repeatedly until death ensues.
Be aware guys. The criminals methods are evolving and they are finding new ways to prey on society. Add these tactics with the Flash Mob phenom...the Knock Out game and you have a recipe for not trusting crowds or groups of youths.
I don't and I'm not ashamed.