Switch off immediately and safely isolate the appliance. Do not run it to see whether the spoon will move, and never reach through the sink opening with your hand.
What the observation tells you
The absence of sound does not establish electrical isolation. A utensil may be visible at the top while another part is trapped below, so forceful pulling with an improvised tool can cause damage. Use only a retrieval method explicitly supported by the model's owner instructions.
A useful next step
If safe retrieval is not clearly described or the item is lodged, leave it for an engineer. After removal, unexplained noise or poor operation still needs assessment.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.