As far as K&C moments that caused a meltdown on FSU even if they wouldn't be classified as meltdowns on their own*, Scott Moir's comment at the 2012 WTT has to be on the list.
*To be honest, I'm surprised there wasn't more of an outcry within the skating community calling for Moir to publicly apologize in order to avoid being censured or getting, at least, a temporary ban from the sport. This was one of the most egregious examples of foul and degrading language I've ever seen, either in or out of skating. If I was a skating coach and one of my students made a comment like that at an international event, I'd immediately kick them out of my rink and method.
In my opinion a "meltdown" is when someone's performance is generally OK, but they throw a dramatic hissy fit when they don't think they got the marks they deserved. Or when they act nasty toward their partner or their coach(es). There are several good examples of those already cited in this thread
After he and Tessa got their scores in the KnC, the cameras caught Scott saying "Oh my God, I hate this event."
Didn't James and Cipres have a fairly legendary barney in the kiss-and-cry once? I think Cup of Tyrol one year not long before they broke out.
Karen Preston in 1994 Canadians is the most heartbreaking for me. Generally, those skaters who did a good job but not a good enough job tend to make me the saddest.
I don't remember either, but it was AWFUL. I also have zero examples to support my claim.
This was the wildest of rides starting with Frank's moustache and ending with their awkward interview. I was delighted that someone threw him a balloon penis only to be disappointed when he picked it up and showed it was just a random mishmash of balloons. Oh Canada, didn't we almost have it all.
One example was at a Landover in the 90s when Eisler and partner competed in drag and had a simple showy program without much skating content. (Bechke/Petrov skated to You Don't Bring Me Flowers in a very detailed program choreographically) Eisler gave the F.U. arm gesture and left the K/C after saying "I don't give a rat's ass". That's one.
That is the only video proof (and this is the performance) I could find, we see him very quickly at the beginning flipping off the judges but the interview is also refreshingly non politically correctOne example was at a Landover in the 90s when Eisler and partner competed in drag and had a simple showy program without much skating content. (Bechke/Petrov skated to You Don't Bring Me Flowers in a very detailed program choreographically) Eisler gave the F.U. arm gesture and left the K/C after saying "I don't give a rat's ass". That's one.
There are so many. My example wasn’t crying though. In general, I enjoyed Maria Butrskaya’s flippent reactions. She would pretend to not care, take off her skates and not look, Nagano she halfway looked and kept walking, wagged her finger in 2001 and ended her career at 2002 Worlds QR by not even stopping at the Kiss N Cry.