Chemistry 101

Professor Dana Watkins, the youngest professor on campus had spilled coffee on her blouse in the car and it had soaked through to ther bra. She figured she could remove her blouse and bra and just wear her lab coat and no one would notice. She brought her vials into class, she did not notice someone had accidentally switched labels on a few beakers and vials.

During class, she mixed a couple of liquids and there was a bang and a puff of smoke.

By the time the smoke cleared, Dana's goggles had been knocked off, lab coat had dissolved, the band holding her hair in a ponytail dissolved, and she was stunned.