Okay, I know I said this contest would last until the end of August, but since I haven't been on, the contest was extended until now. It's now November, and since only one person entered, no winner will be announced. I've also decided to update the rules for future contests:
1. There must be a minimum of two entries in order for a winner to be announced. If only one entry is submitted, the contest will end at the deadline with no winner, and the caption used will be mine.
2. Any captions containing the F-bomb will not be considered, no matter how funny it is. Multiple offenses will result in disqualification.
3. If a picture contains more than one character, please specify who is speaking in your caption. Otherwise your caption will not be considered.
4. You may submit more than one caption, however if you think of more than one on the spot, put them all in one comment. It will save me time and space.

Please take the time to read these rules and understand them. It will help us both out in the future.
Here are my captions again, since there's no winner:

Fox: Grrr! Fourth! Lemme at ya!
Minato: XP Sorry, Nine-Tails. Better luck next time. I win!
Naruto: Hi, Fourth. Where'd you come from?