What do you think is the most traumatic experience for each character in the entire series?

So I'm writing a crossover fanfic where Greg and his family are in the world of Worm, a superhero Webnovel story where people get super powers based on the most traumatic experience in their life.

So far I managed to write down Greg's traumatic experience using the time in Cabin Fever when Greg found out Manny left his family to die which gave him the power to create robots and machines that do human tasks effectively.

And Rodrick who got his power of turning into an unkillable ghost after he woke up thinking he had his brains blown out in The Long Haul.

So what do you think are the most severe traumatic experience for each character.

(I'm gonna be surprised if Manny has had an actual traumatic experience)