Q. My 9 years old cat stark g to jump weird and became very unresponsive afterwards. His walking weird also.
A. What you describe may be seizures. Your cat should be seen by your vet to definitively diagnosis the condition. Monitor for future occurrences, classic signs are stiff limbs with an arched back, excessive drooling, teeth chattering and possibly loss of bladder control. The recovery period afterwards may include unresponsiveness or uncoordinated gait. Start a log. Record data such as time of day/night, duration, description, diet, activity, etc. Around each episode. This may help your vet pinpoint a cause or triggers.