You can't stop the disposal. The disposal drains slowly. The disposal is making an unusual amount of noise. There is a leak in the disposal. Continuous Feed - Activated by a wall switch.
Problems usually involve jams or clogs, or occasionally leaks.
If dismantling the Disposal or working on electrical connections, shut off power at the main disconnect. Never put your hand in the Disposal. Use pliers or tongs to remove an object. Never pour a chemical drain cleaner into a Disposal. If your Disposal makes a loud whirring noise or stops, it has jammed.