> > ...try visualising the reflection as a 'virtual' object existing behind the mirror and all should (or might) become clear.
>
>
> I have no idea what any of that means. :-)
>
>...Mirrors actually reverse only in the direction perpendicular to its plane -- what is in the front is moved to the back and vice versa. This appears to reverse left and right also, because left and right are indicators relative to the angle you look at something...
>
> On the other hand, "top" and "bottom" are not indicators that depend on where you are horizontally. The top is always the top, and the bottom is always the bottom -- so these are not reversed when you look at an image that's reversed front to back.
>
> Put the mirror face up on the floor, and it's a different story -- in that case, the perpendicular dimension is vertical, and top and bottom are therefore reversed.
>
> Having said all that, I have no idea if this will make more sense to anyone but me than enile's explanation does.

It makes more sense to me...