Build a high building
Put a door underneath
Stand in the middle
Close the door and should look like this
Hit quit to title(the last one)
You should be at this screen(mine is different) Then press play and go into the same world.
Hope u liked it. Also hope it helped you! Pls follow me, comment and like! :)
(UPDATE) Unfortunately this doesn't work in 0.10, I tried. (Or does it?)