"Dude, where's my class?"

The dexterity with which second year mechies 'mass bunk' is commendable.
Time: Friday, last hour
Reason: Friday, last hour
Seen: Senior faculty member chasing a frazzled bunch of duds, who, after abiding by strict instructions to steer clear of the main building, decided to have a bonding session in the SS.
Simultaneously occuring event: Class committee meeting, complete with the CR, clueless 'bout the entire escapade + HOD + n-hazaar other profs.
Result: Senior (irked) faculty member reports 'issue' to the HOD. Demands explanation from tongue-tied CR + written apology stating reason for absence.
Dire consequences: If the aforementioned were not fulfilled, entire class flunks course.
Fact: It's relative grading... Flunking everyone don't matter!!
Confusion: Right..?