I'm going to look like a 12 year old here.... But was reading that bumped thread from way back about Super-Cavatation torpedo and reminded me of this..
This is a trailer from an old Japanese cartoon being redone/rebooted.. For those of you not interested in watching the entire thing, please fast forward to around 6:09....
Not sure of the physics involved that would make this a possibility.. Obviously, this is some sort of energy shield... But I wonder if this could be done with some other element (Air, Sound, liquid metal, compressed water???)?? Anyhow, it looks cool.... And I'm having a really good day today...lol

**cough cough**
http://www.youtube.com/watch?v=8llG4Y1ca0U&feature=related