When I read Kristian's blog entry about politicians thinking aloud about installing armed railway guards, the absurdity of that train of thought (if you pardon the pun) made me chuckle.
But I couldn't help but laugh out loud when I read Olav's explanation#c10755 (translated):
It must under all costs be prevented that terrorists hijack trains and, for example, steer them into a Frankfurt skyscraper.