Baking soda and baking powder are not, I repeat, are NOT interchangable.
There is a recipe card with my mom that has a handwritten note as a result of a waffle mishap, "If intent is to poison siblings, substitute baking soda for baking powder"

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“Sometimes I think we're alone. Sometimes I think we're not. In either case, the thought is staggering.” - Buckminster Fuller

"A man talking sense to himself is no madder than a man talking nonsense not to himself." - Guildenstern, “Rosencrantz and Guildenstern are Dead”