“We can play the blame game all day but in the end it’s Skirbo’s fault.” -Calabasas
Critical fumbles can really spiral out of control. I love hijinks but I try to avoid strict mechanical failures when someone roles a nat 1 on a skill check. I describe it in a funny or dramatic way and we keep the momentum going. I think critical fumbles can work well for some tables but make sure to talk about it during your session zero. You don’t want to surprise your players with a homebrew rule like that!