A cat suddenly rolling and twitching on the ground may be caused by the following reasons:

Poisoning: Poisoning: Possibly ingested toxic substances.

Nervous system problems: such as brain diseases, nerve damage, etc.

Electrolyte imbalance: such as lack of calcium, potassium, etc.

Parasitic infections: Certain parasitic infections may cause this symptom.

Cardiovascular problems: Heart disease or blood circulation problems.

Acute pain or discomfort: such as abdominal pain.