This happened at a baseball game in South Korea. SK telecom 5G AR.

Why aren't people running?

They were told it was a hologram show before hand.

then why aren't they watching?

https://www.thefastmode.com/services-and-innovations/17727-sk-telecom-launches-augmented-reality-ar-service-based-on-5g-edge-cloud

Thank you - I actually looked them up after watching yours & saw tons of these on YT. it's cool but I am not a fan. my first thought was the harm it does to children. it teaches then not to be afraid, confuses reality, & may diminish their enjoyment of real life.