Prof: blah blah blah
Rohit: zzzzzzzzz
Prof: blah blah blah blah
Rohit: zzzzzzzzzzzz
Prof: blah blah
Students: sir, time is up, please sir, we had classes all day, etc. etc.
Prof: hmmm, ok, ya, anyway this part wasn't in your syllabus.
Rohit: SIR... CHEATING!
Prof: Oh, now you woke up
:)