When Kakashi entered the door, he saw the bucket coming down and quickly thought if this was an act of teamwork. When it landed, all three Genin were satisfied, which made Kakashi feel a little glad that they used teamwork. However, he was extremely upset that he was hit with boiling hot water. He said,

Kakashi: "Hmm, let's see my first impression of all 4 of you. I despise you all."

Sakura: ARE YOU KIDING ME MORON!! Sakura is mad at Naruto

Sasuke: Naruto you dweeb. Sasuke is pissed whit Sakura both having a frown

Naruto: Grins