Labless Day prank...

On thursday i went to college at 8am... went into mee lab class... ask him after lab 6 still got lab 7 need to do or not... 'nonono lab 7 no need do!' Why i come so early for... Later at 12pm went for sri lab... 'nonono lab 6 dun need do...' alamak y kenna prank twice by lecturers???