There were quite a few songs where after Kayori failed in the beginning, she started yelling ("AAAAAAA"). Even talked about some "gamer rage" moments. It would be pretty funny if missing notes caused her to actually express ways that she was on tilt, and might give her something to do rather than be silent for the majority of the song. Even just saying "Filtered" would be funny. This is me riding under the assumption that Kayori Osu wasn't a one-off stream, though.
