Jacob's Phenomenon

The Jacob's Phenomenon describes the tendency to perform worse on a second attempt at a task, despite expectations of improvement. This effect can be attributed to overthinking, reduced adrenaline and focus, or pressure to replicate initial success. Neurological fatigue and natural variability in performance also play a role. For instance, a basketball player may sink a perfect shot on their first try but miss the next due to overanalyzing their form. While the phenomenon can be discouraging, it is typically short-lived, and consistent practice helps individuals overcome the dip and achieve steady improvement.

Oh, Luc you can't parry anymore? Must be "Jacob's Phenomenon".