On Riptide

Syntaxes	Version
[use of] riptide [enchant[ment]]	2.5

Called when the player activates the riptide enchantment, using their trident to propel them through the air. Note: the riptide action is performed client side, so manipulating the player in this event may have undesired effects.

Exemple:

on riptide:
    send "You are riptiding!"