stupid lecture today

can't stand that stupid guest lecturer today during econs lecture...he lectured for a whole 2 and a half hours, and didn't give any breaks in between...and he was wondering why there were people falling asleep and others walking out to go toilet or just to leave altogether...i thought there were some studies shown that a typical student's attention span is 45mins, beyond that they don't really retain much. which is why usually there's a break every 45mins-1hr..i thought every lecturer knows this? idiot...fortunately it's only econs so it's just a refresher..idiot..

nothing else much to say...have been saying and thinking too much lately anyway...