Shulker-based Dual-floor Elevator

This is a survival-friendly elevator based on the shulkers in Minecraft 1.9 snapshots. It worked as of 15w31a, but could of course break in future snapshots.

The idea is to use a piston to open a hatch to a Shulker long enough for it to shoot the player once, then close the hatch again once the player starts traveling upwards. On the first floor, a piston pushes the player forward to avoid them falling back all the way down, and to facilitate getting off easily.

On the second floor, the player is again pushed forward to make sure they smoothly land on the top floor. For the details, see the video.