The same stuff happens for Pinkie. She throws parties, and ponies go to it, but as most of the time, she parties too much, and that scares others. That, or she doesn't party hard enough when compared to another party pony, and that disappoints others. What if this process was to keep on continuing? Eventually, insanity would kick in.

This story has a bit of dark humor in my opinion, but that's your call.