going out of the classroon without permission?

everyone would knew tat when we going out of the classroom should asked the
permission form the teacher ryt?
eg:going to toilet...
And so,the funny things happen...
My Eng teacher...i always blog it out abt her(elzie)

Yesterday,we having afternoon classes..
she'd two periods
And It's totally bored...
And then.
I saw Faustina(my classmates)she walk out of the classroom..(no rush,no run)juz normal walking..
walk out to the classroom..
Tat tym teacher was writting sumting on the board..
ANd she didnt felt Faustina walk out of the classroom..
It's not the first tym..almoz quite alots..
N so..I oso quite interested to try ..
SO,i sits bside shannon
bcauz she sits near the door..
so,i go out successfully..
teacher no feelings tat i wentout..
haha...
so i go to form 4 find my fren awhile asked her to accompany me go back to class..
So she does...
when im going back to class..
Teacher was near the door..
i juz went inside..
N she still not feel tat im came from outside..
Lame ryt~