When sugar snap peas become real peas. Then you can't eat the skin anymore. At that point the peas are no longer sweet, instead they taste like mushy pea yuckiness that used to plague your school lunch plate and unassumingly sneak into your mashed potatos. And you never realized it until the mush was already in your mouth, by that time it was too late. You couldn't spit it out because school is a dangerous social ground on which not to open yourself to unnecessary brutal self-esteem attacks.