Trick that backfired

i wish i had not done it.if i had been more sensible, the accident would not have happened; but it's no use saying that now.
one day at school last term we didn't have very much to do.the teachers had all gone to a staff meeting, and most of us in class were chatting, joking and reading magazines. ryan , who had to prepare for an overseas examination,was the only one who was working. he had a large physics book in front of him and was making careful notes in an exercise book.
he looked so serious that i suddenly had a marvellous idea for a joke.i crept up behind him and quickly snatched his glasses from his face. the others in the class roared with laughter,as i took him completely by surprise.even the girls over on the other side of the room giggled. sara told me to give the glasses back, but i knew she was not serious.everybody was enjoying the joke except for ry...