ok, pretty funny...she has a right to be pissed though. good joke gone bad. shes probably embarrassed. apologize to the teacher even if he is cool. its the gesture that counts. make sure she knows you spoke to the teacher. and again offer your apologies. then she will probably relax about...
some of my personal favorites...love postal service...also try...editors, built to spill, arcade fire, modest mouse, death cab for cutie, interpol....there are many!