"Quiet down now, girls," said Sister Benvenuta. "Today we're going to read some of the work of Robert Frost."
"Yes, Sister," said the girls - all except Concepcion O'Hara. She kept talking, and under her desk slowly raised a finger. From her earphones the faint sound of rap came as a tinny echo.
"I SAID QUIET!" said Sister Benvenuta.
"Blow me," said Concepcion O'Hara, quietly.
"I will, then." Sister Benvenuta opened the top of her desk and pulled out the AK-47. Already loaded. She cocked it,* fired.
The bloody shreds of Concepcion O'Hara settled on the girls. A hand landed in front of Sister Benvenuta with a sad wet 'flunppp', one finger still extended.
"Open your books at page 47, girls," said Sister Benvenuta, blowing away the smoke** that drifted from the barrel of the AK-47. But the girls just screamed and screamed.

* Do you have to cock an AK-47? (Whatever 'cock' means.)
** Does smoke come out of the barrel of an AK-47? Do you still call it a barrel?