Ryan Brenizer Method - shoot with an effective f/0.4 lens!

http://www.ryanbrenizer.com/category/brenizer-method/

Been trying this ever since I got a D800, mixed results as I find it's difficult when you use it for portraiture. It's really quite interesting. I stumbled upon it as a friend of mine who has just started in the last few months to get into photography asked me a weird question. He said

"Is there anyway you can use a long focal length but get a wide angle of view?"

I thought about this for a second thinking, well that's a paradox, optically isn't it? But after thinking about it and researching I found this method which actually for certain pictures really works well. The effective apertures are crazy. Scroll down to the autumn shot on the page! I will try and get an example up if I get a chance, so far I am having stitching nightmares in CS6 but with practice I am getting less errors so I live in hope as stitching is new to me and not something I have not considered until now.

Anyone else trying this? I'm sure it would interest many. You can go infinitely wide angle but still isolate a subject, which is very very intriguing to me.