Minecraft wiki entry for Armor_Stand, associated text: Equipping armor stands with certain blocks and items can cause rendering glitches. According to Searge this is due to transparent rendering on entities not yet being supported.[4][5]
Bedrock Edition has a version exclusive armor stand model, which includes posable arms.
Using redstone to change the stands reverse the poses, starting with the Can-can pose first.
Placing the stand within three powered redstone dust always changes its pose to the Honor pose. Repeaters also switch the stand to the honor pose if not set four blocks from one.
Using external tools, armor stand spawners can be placed.
Secret signatures for JAPPA and Searge can be found at the bottom of the Armor Stands texture.