At least 11 people were stabbed in a bloody scene inside a Michigan Walmart Saturday night — causing terrified shoppers and employees to flee — before a brave armed citizen helped detain the knife-wielding maniac, according to police, witnesses and harrowing video.

A 42-year-old Michigan man accused of carrying out a knife attack at a Traverse City Walmart has been charged.

Video shows an armed bystander confronting a knife attacker who allegedly injured 11 people at a Walmart in Traverse City, Michigan, on Saturday.

"I'm still sitting and grappling with the weight of realizing that it was kind of a life-or-death moment," said Julia Martell, who witnessed the stabbing, which wounded 11 people.

Video footage from the incident shows bystanders confront the suspect after a stabbing rampage that initially left 11 people injured.