Questione giuridica chiave
Whether the horse's sudden bucking jump constituted an accident under Art. 4 ATSG.
Decisione estratta
Yes. The event involved an unusual external factor because the horse's reaction was unlikely in view of its character and temperament, and the rider was not reasonably expected to anticipate it.
Motivazione estratta
The unusualness test concerns the external factor itself, not its consequences. Based on the consistent account of a bucking jump and the expert opinion that such a reaction was very unlikely for this horse, the movement was programwidrig and therefore unusual.