Failing transmission
if it is automatic then this would be caused by shift down is not working in transmission
make sure your kick stand is up
Shift down in to a lower gear.
I believe it has something to do with the "lockdown" where the transmission does not shift down causing the engine to stall....On the driver's side of the engine toward the front bottom there is a BLUE connection that if you disconnect the override should not occur.........have an 85 cutlass ciera have been driving it that way over a decade and solved the same problem for me..........try it......Cutlass~Cutee
the cluth, need to adjusted or need new one.
Torque converter clutch solenoid
I would suspect fuel pump failure.
The best bet would be in a small paddock where the horse can lay down freely, and graze grass and hay. Keeping him in a stall 24/7 might make it anxious, nervous, or have to much energy. So, if the horse is not being exercised daily, he should not be fed fatty, rich foods that it would normally need. So, by giving him hay and grass, it will keep his digestive system in balance. You can stall him for periods of time though, be he will need a break.
cam position sensor has failed
Yes motorcycle gears will shift up and down.
vehicle is still in gear, step on clutch
If your car is an automatic (not a stick shift) then the car will automatically shift down as you ease off the gas petal. If it doesn't down shift then you need to have the vehicle checked out to see what is wrong.