The FAIL Seizure occurs when any of the characters sees something that says "FAIL". As a result, they say "Oh noez FAIL Seizure hahahahahahahahahahahahahahahahahahaha etc." very fast. The earliest form of the Fail Seizure dates back to Akriloth2160 using a smaller version of this which reads as: "FAIL" "hahahahahahahahaha etc." at normal speed, which dates back way before the FAIL Seizure was created.
The FAIL Seizure also hit emergencyranger88.