Okay, soo... i'm not a month late with this update.
BUT, i finally remembered to write the Elytra knockdown, as requested by somebody on the discord.

It's pretty simple. If a player is using an elytra (aka. flying with it) and a fireball hits them (it has to be a fireball thrown via command or the player) They will be knocked out of flying, and will fall down, and, unless they reactivate their elytra in time, will fall to certain death >;D

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Have a wonderful weekend!