You were talking about yourself and your techniques, one of your techniques was shapeshifting, and as you said that...

Yuji: OH! TRY SHIFTING INTO ME! PLEASE!!!!!

You sighed then reluctantly agreed, you grabbed his arm, but...you didn't really turn into him, you had... Sukuna's markings on you, he only took control for a few seconds then Yuji grabbed your arm, the marks disappeared, everyone was shocked, why didn't you shift into yuji...?

Yuji:...

Megumi: what the hell was that?!