Beds: spawning on blocks

There is a trick you can do so that you spawn on top of a pillar of blocks when you die. If you are unsure what I am referring to this video explains what you could do with beds http://youtu.be/V3uqyUoqWRE?t=19m42s (just watch a few mins from 19:42 on) This trick was really fun and should stay in the game. It still works in 1.7.9 it is only bugged for 1.8