Here I found a graphical glitch when placing TnT over water, here is the video, (You have to build the walls around the TnT like it is in the video) https://www.youtube.com/watch?v=MAtL82XnUgQ
MC-60501
Minecraft Water Texture Bug
Resolved
Duplicate
1
Dylan
(Unassigned)
Unconfirmed
Minecraft 14w27b
Retrieved
As far as I can tell, this issue occurs with practically any block on top (glass was the only exception I found), and either lava or water on the bottom.