TV show I saw in the 90s, I think it was British.
Main character is a high school boy who discovers an alien spaceship while out walking with a friend. They keep the ship hidden and fight over how/if to use it.
I remember a specific scene where someone discovers their secret and the boys panic and chase after him in the ship. After flying for a bit the camera switches to a cockpit view and you can see the man hurriedly walking up a hill towards the school on the main display while the boys frantically try to figure out what to do. They decide to fire a stun ray but realize too late that it was calibrated for a much larger radius than planned (10km vs 10m) and end up knocking out the entire school in addition to the fleeing man.
Ship was relatively small, about the size of a car, and bronze colored. Was bulbous in design; not many hard lines and kinda tapered on one end.