And not show you my seesaw trick?

One of the characters from Danganronpa V3 murders someone using a "seesaw trick". But by the time the other characters figure that out, they realize that for various reasons, this person didn't need to commit the murder in the first place. When Joe wondered why the murder was committed, he came up with the intentionally poor explanation that the character ought to commit the murder because they went through all of the trouble of setting it up, and they wanted to demonstrate their plan to everyone because they were so proud of it. This lead to him saying "And not show you my seesaw trick?" in the Yusuke voice, because he was doing that voice for that character. But it turned out that the actual explanation was even worse and more convoluted.