bai jual roti

today in one of my classes, i said this:

"Bai, roti kaya satu...!"

Why?

Sebab ringtone sorang budak ni bunyi hon bai jual roti.

And when his phone rang again 5 minutes later:

"Bai, satu kali bunyi lagi, itu tong roti saya angkat sumua haa"...