I did that once (Score 2, Funny)

last year my English class had 2 do a slideshow on Henry V (play not the king)(Shakespeare) and for fun my group made a l337 version. We mistakenly gave the wrong one to our teacher. There were things like this all though it: (own dialect of 1337 in some places)

|)13 |=|23|\|(|-|135 ! (Die Frenchies die!)
r0x0r'd ur b0x0r5! (Rocked your boxor's! (kicked butt))

Needless to say our teacher though the file was corrupt and gave us an extension! lol