If a garbage disposal keeps running after its control is off, disconnect its power safely and keep hands out of the drain. A failed switch, controller or wiring connection needs diagnosis; the overload reset button is not an off switch. Leave hardwired connections and wet or damaged electrical equipment to a qualified electrician.
Stop it without touching the wiring
Turn off the identified disposal circuit at a dry, safely accessible electrical panel. For a cord-connected disposal, unplugging is another option only when the plug, outlet and surrounding area are dry and safely reachable. Do not reach through water or a leaking cabinet to get to a cord. If you cannot safely isolate it, keep clear and get electrical assistance.
The InSinkErator and Moen safety instructions both say to keep hands out of the disposal and disconnect power before clearing objects or servicing it. Here, there is no reason to reach inside at all. An ordinary food jam explains a unit that hums without grinding; it does not justify letting a continuously running unit keep going.
Identify which control should stop the motor
A wall switch, countertop air button and batch-feed stopper are different control systems. Note which one you have and whether the trouble began after a replacement or other electrical work. The cited Moen manual describes a batch-feed stopper that starts and stops the covered disposal; that operating method does not apply to a continuous-feed model.
InSinkErator's troubleshooting separates cord-connected and hardwired equipment because the control, outlet wiring and disposal itself need different checks. An electrician can determine whether the intended switch is actually interrupting power. Leave live-voltage tests, opening switch boxes and changing connections to qualified personnel. Do not plug the unit back in repeatedly to demonstrate the fault.