In my 20 years of teaching.

If you ever hear your teacher preface a speech with this sentence. You done fucked up. It is over. You are finished and will never see the light of day again. The heinous crime you have committed by blasting loud Indian music while the substitute was teaching would have catched up to you eventually. Now you must run hide and maybe even hide.

In my 20 years of teaching. I have never seen a more disrespectful class.