I found this clip online that shows the speed tape on the Lockheed U-2 going what I perceive is the opposite direction to the 'normal' convention. On most aircraft, the higher values are above and so the tape scrolls downwards, but in this case it is mirrored.
Observe indicator on left for the first few seconds in the following clip:
Here's a photo as well from a french forum, actual source unknown:
Why do this? On every aircraft I can think of it is the opposite.
Is it the fact that you pitch down, speed increases? Then you got the speed/altitude indicators moving in different directions, so I don't see how that would make it any more clear, especially when it appears it's the only aircraft doing this.