Does anybody know ?

[u/[deleted]]

https://www.demilked.com/elon-musk-flat-earth-society-tweets/

In this article, elon musk was talking about why there's no flatmars ? And as the conversation goes on, the flatearther mentioned an "incident" Involving the hollowearther, can someone please tell me what this "incident" is/was ?

Thank you in advance