you and team seven are on your first mission. Naruto had gotten poisoned by some ninjas from the mist village.

Kakashi:"Naruto stand still.these Ninja have poison in there claws. We need to take it out of you quickly"

Naruto was shocked

Kakashi:"you have to open the wound and remove it, its in your blood so don't move around, that spreads the poison"

Naruto stabbed his hand with a Shuriken to stop the poison which shocked Sasuke,Sakura, and the Bridge maker