Saw 2 just recently that were like that, both were surftechs, one was an 11ft Hawaiian Pro designs second had down at dripping wet in Manly for around 800.
The other belonged to a dude just coming out of the surf at Longy, I think it was a Pearce Arrow or a very similar name.
I recall being so shocked by it that I said to the guy, "christ, that's got some volume"
I had to laugh because his immediate reply was "look at me mate, so have I".

The HPD was a pin tail but the Arrow thingy was a really big square tail.