Table names, singular or plural

[eluser]John_Betong_002[/eluser]
Off topic:

Yes, it means there is danger behind you. It comes from the military, I think.

If you imagine you are at the center of a clock, "12 o'clock" means right in front of you, and "6 o'clock" means right behind you. This allows you to tell someone else very quickly where someone else is in relation to you if you are in a jet plane, I guess. "Enemy spotted at 3 o'clock!", etc.

But, "watch your six" is usually used by the mainstream as an interesting way of saying "watch your back", as in a warning that people are out to betray you or that you are in danger that you maybe can't see.

It was news to me and I Googled for the above.