i suddenly rmb sth while studying ..

we were given a surprised test that wasnt graded previously .
(open book one too though)
when the test ended, the tutor was asking who think that the resultant wave is a pure sinusoidal one. me and aaron raised our hands .
thus, dylan asked "my fren in black, how is this so?"
den aaron quickly took off his jacket .
HAHAHAH SO CUTE RITE .
i was laughing hard and den the whole class laughed tgt .