...and the one time he knew he couldn't. I have this headcanon that Wu has a really hard time trusting in anybody... but he's always been able to trust his brother. The rest of his team, the elemental masters... they're a different story. Five times where Wu had to trust someone, and one time he knew it was impossible...
Sometimes we love to make ourselves gasp. I understand the feeling and made a nice little book so that you can gasp all you like. Most of these stories are mine, but if one of them isn't then I'll be sure to mention that beforehand and give credit to the creator. Feel free to comment your own ideas for twisty-plotted...