I also once chewed random dry twigs while on a camp in a remote bit of bush in the desert - very lucky they didn't turn out to be poisonous, we were at least an 8 hour drive from the nearest nurse/doctor.

I told a supervising adult that I had splinters in my throat

and he scoffed at me "How could you possibly have splinters in your throat????????"

and I was too embarrassed to admit to chewing random twigs, so I just endured the sore throat until it went away (lucky it didn't get infected)

As a child I also chewed:

blue-tack;

plastic biro lids;

the tiny rubber tyres from lego moon buggies;

paper;

wax candles;

my mother's favourite wooden spoon...