Chemistry relief teacher walks into our class 08S41.

[Teacher]: Is this s41?
[Class]: No sir, this is s55.
[Teacher]: s55?
[Class]: Yeah s55.
[Teacher]: Sorry then (turns to leave the classroom)
[Class]: (bursts into laughter)

In the end we told him that we were indeed s41. Haha.

Dunno why some s55 people kept walking into our classroom after our Friday's Maths tutorial. That's the reason why we used 's55' to trick the teacher. Wei Liang, your class leh!