a yellow line

i really get sick of all the announcements in the MRT stations. First, there's the one telling everyone to not eat in the stations and trains. Then, there's the one to tell everyone to report suspicious articles. And finally there's the one to tell everyone to stand behind the yellow line.

If someone is stupid enough to stand near the train when it comes into the station, then he probably wouldn't understand the announcement anyway. So it doesn't make a difference. Or he wants to die anyway. Likewise, the boring announcement wouldn't make a difference. maybe the guy would want to die even more, knowing that the world is so boring.

Still, there's something wrong with the announcement, cos it tells you to stand behind the yellow line. But the yellow line is simply what it is, a yellow line. which way is behind? maybe it's that enticing piece of grey cement that we're supposed to stand on?