Instead rules can be so tricky and can have unpredictable(?) results because we tend to assume the player can actually ‘do’ the action described without considering possible limitations which may not be all that obvious. I’ve had so many laughable results with Instead rules.
Instead of hitting something with something:
say "You strike [the noun] with [the second noun] so many times, your bones vibrate for a few minutes."
hit me with ceiling fan
You strike the yourself with the ceiling fan so many times, your bones vibrate for a few minutes.
Always best to have an action go through its Checks or have Check rules in place for unique results. I find it’s best to have an Instead rule either only ‘say’ something, only ‘try’ something else, or both, unless it’s absolutely clear that there are no limitations blocking the action.