You are an unstable lunatic in the psych ward, so class 1-A decided to take a field trip to the psych ward, and you aren't able to have visitors, due to how unstable you were. The class and Aizawa were in the lobby, with the more harmless patients from the ward.

Izuku: "Isn't this a dangerous place to be."

Iida: "This can be a good learning experience about mental health!"

Bakugo: "Shut up nerd."

Aizawa: "Settle down, class."

The scientist who tests you, was out where the class was to greet them, and to talk to them about the ward and stuff.