[ElliotM]

These numbers don't remotely pass a smell test. The same study claims 2% of Americans have been injured in a mass shooting, and cites 500 mass shootings a year.

2% of 340mm = 6.8mm injured in a mass shooting Conservatively assuming that's equally spread across all ages, and assuming a lifetime of 80 years, implies 6.8mm/80 = 85,000 people injured a year 85,000/500 mass shootings a year = 170 people injured per shooting

This is absurdly high - the Pulse nightclub shooting for instance injured 60 people.

It's obviously harder to analyze the number of people that 'witness' a shooting, but it also seems implausible that an average of ~595 people are witnessing each of these 500 shootings.

The problem here is that self-reported studies like this are incredibly unreliable. Interestingly, the same effect appeared in a pro-gun study, which cited an insane 2+ million defensive gun uses a year.