plz explain, thx!

The CEO of a well-known Kitchener business was dining (pre-Covid} in a nice restaurant in Kitchener. The server, who was new to Kitchener-Waterloo, did not know who the CEO was. At the end of dinner, the server was on break and went outside to get some fresh air. The seating host nished up the billing and took payment from the CEO and her party. This was the very last thing the host did before nishingfleaving for the day (and exiting a door different from where the server was standing). The server re-entered the restaurant from break a few minutes later only to see the CEO and the dining party had left the table and were only a couple steps from leaving the building through the front door. The server panicked (thinking they had not paid and he'd be responsible for an unpaid bill) and yelled in an intimidating way, "Get back here!!, Don't you dare try to leave without paying your bill!". Another diner, a citizen who ran multiple social media accounts, couldn't believe it and quickly took a picture of the surprised dining party and wrote a brief post titled 'fat-cat CEO runs out on restaurant billl' Although the CEO got the situation sorted out, she is still livid with both the server and social media poster- and thinking about legal action. Other than negligence, explain in detail the possible legal claim(s) to be made by the CEO