The next lesson- Physics

The bell suddenly rang to announce the end of the lesson.

"Hurry up!" Sandry said.

"Almost done..." Robyn replied, "...there!"

Sandry moved her leg experimentally. The staples made the material a bit stiffer, but at least she was covered up.

"Come on, let's go." Robyn said, grabbing her bag.

The two of them made their way only a few doors down and into another science lab. Their teacher stood at the front with an enormous device wrapped in copper wiring.

"Gather around, class." He instructed, "But if you have any necklaces or jewellery, leave them at your desks.

Having no jewellery on, Sandry walked to the front with the rest of the class, while Robyn unclasped her necklace.

"What we have here," the teacher explained, "is an incredibly powerful electromagnet. As you remember, it is currently producing no **** as it is turned off, but..." He moved some of the students aside to show them a selection of metal ball bearings and weights on a desk, "when I turn it on it will produce enough magnetism to pull most or all of these objects to it."

As the teacher went to the switch, Sandry turned to Robyn, who had just joined her.

"Robyn, how much metal is currently attached to my clothes?"

Before her friend could answer, the teacher switched on the magnet.

RRRRIIPP!!

Sandry's blouse and trousers, laced with metal staples, leapt from her body, the remaining seams parting, and they fixed themselves firmly to the magnetic copper wiring.

Only Sandry and Robyn knew why it had happened, to the rest of the class Sandry had been fully dressed one second, and then next her uniform had flown off her and left her in white cotton panties with 'Monday' written on the front, and a white bra with pink lace trim and bow.