If a rider loses their stirrup during a performance, what is the appropriate penalty?

In equestrian competitions, if a rider loses their stirrup during a performance, it generally results in a five-point penalty. This is because losing a stirrup can impact the rider's balance and control, which are critical aspects of maintaining a proper riding position and performing effectively. The five-point penalty reflects the significance of stability in equestrian disciplines; it's intended to discourage riders from becoming overly reliant on their equipment and to promote skillful riding.

The penalties serve to ensure that riders maintain a certain level of competence and control throughout their performance. While a two-point penalty might apply in other less critical circumstances, losing a stirrup is considered a more substantial error, hence the higher penalty. The options of no penalty or a score of zero would not accurately reflect the impact of the lost stirrup on the overall riding performance, as these outcomes would be reserved for more severe infractions or failures to complete the course.