I decompiled the Flappy Bird android APK a couple days ago, and after while, I've noticed something strange.
The gfx base image, which contains all the sprites and other stuff. Also have a red tube, but I never saw any of this thing (only hacks and fake videos).
Where do these red tubes appear?
EDIT: I also, did't notice before posting here that the red tube, have two up variations, and no down one.