Thomas runs into the science class getting lost of where he was already, he turned to look at the new teacher, believing he was a pupil he started shouting "BOY SIT DOWN! AND MOVE THAT 'THING' OUT THE WAY!!". he turned and faced the board, grabbed some chalk and wrote his name on the board, dictating what he was writing as he said it "Doctor.... Davidson, History". "now where was your last teacher?" while saying this he turned on his heals to face the class, what he saw made him mortified. the class was set up with gas taps and chemicals, students were laughing at his mistake.

(basic this is linked to the post above, he walked into the wrong class room and set to work, Worse. First. Day. EVER.)