This really isn't something they teach you in journalism school.
Four years ago, Quentin Sommerville was reporting in front of a pile of eight tons of burning opium, heroin and other narcotics--For some reason. As you can see, Sommerville got a bit of a contact high, to say the least. The video just resurfaced recently.
Despite his brain's inability to function properly, I'd say that Sommerville showed a great deal of journalistic integrity simply by trying to complete the report and not giving up as soon as the high hit.
Or, perhaps, he didn't even realize that he was high and his cameraman was hoping to show this video at the BBC Christmas party that year.