Good have been really bad if he hadn’t been there.
Check it out:

An argument that escalated into gunfire could have turned deadly for the 20 people who were eating at a Vietnamese restaurant in Houston Sunday night if not for the actions of an armed patron.

Two men were involved in a disturbance at the Mien Tay Quan when one broke away and retrieved a gun from his vehicle. He came back to the eatery and began shooting from outside the building, shattering windows and putting patrons in grave danger.

Luckily, Anthony Yet, an investigator for the Harris County prosecutor’s office, was having dinner at Mien Tay Quan while all of this was happening.