possible to go trouch chests.

( in both survival / creative)
hard to explain, maybe the link to a video will help a bit?
http://www.youtube.com/watch?v=2McsNcDc_70
and in the picture you see i'm standing in the chest.
-
you need to keep walking in the direction of the chest after jumping, than when you shake the camera a bit you end up in the chest.