These days, it doesn't make much sense to use -c periodic checking, since disk data errors are
unlikely to be associated with mounting. It makes a lot more sense to use -i periodic
checking, which you can schedule for some time when you're not giving a presentation.
Actually, it would make most sense to do it at shutdown sometime the system is plugged in and
you're going to bed, controlled with cron/anacron for noticing the need to check it and
shutdown scripts to identify that it's appropriate. Obviously, there's practically no chance
that the periodic check would actually happen to trigger on the first mount after disk
corruption occurs, and it's more likely that corruption would happen during a write (and thus,
while it's mounted) anyway.