RedactedNarrative: While being towed into a slip, operator accidentally hit throttle into reverse, putting the throttle in the wide open position, causing one towboat line to part striking towboat operator. Towboat operator sustained an injury to his left side from his chest to his back and also sustained a cut to the shin on his right leg. During this incident while V1 struck V2 bow anchor & anchor roller causing damage to the starboard side of V1. V1 also struck an unknown object causing damage to the transom door. No damage observed on V2.