Just a scenario i want u to pls help me to imagine

Remember during our WAEC days, we had d orientation that if an external
supervisor catches you with an expo, u should immediately chew it and swallow it 2 destroy the evidence.
Now picture a good day, while in Biology exam hall, an external supervisor, shouts from behind "Hey! U, stand up and surrender what's in ur hand". And ur mates starts telling u Chew it and swallow it! Chew it and
swallow it!!" Even the teachers wanted to help by signalling u 2 chew and
swallow it,

immediately u showed what was in your hand, it was
MODERN BIOLOGY TEXTBOOK.

PLS WHERE DO U BEGIN THE CHEWING?