I'll go through weird spells where I have a lot of cheeky accidents. It's like I suddenly get clumsy about chewing, especially when eating fast, and my jaw will sort of start to wobble. Sometimes I can even tell a split-second before it happens, and then suddenly "CHOMP!!!!!"

Of course, then the bitten cheek gets swollen and rebitten a few times for the next few days. Then, just as randomly, I might go months without an accident.