Isiah Rider did that once, vs us I think.
It was similar to that play, only not pure luck (he was kind of facing the basket) and much farther out -- he really was pretty close to the half court line.
Here's my take on Durant -- I don't see how he can be a power forward in the NBA. He's dominating physically in college because you don't find many 6'9" guys with his athleticism, but he has an extremely lean frame. That said, he's really quick and has a nice pull up jump shot, and I think the Tracy McGrady comparisons are apt. He's a bit clumsy driving to the basket because his handle isn't quite there, and as Rick Majerus pointed out he isn't very good at all going left. He does have some nice post moves which should come in handy if he needs to post up smaller SFs, but again, I can't really see him being able to guard strong power forwards in the NBA.
The comparison I'd make is Tracy McGrady + defense. He has nice shotblocking timing and good defensive anticipation, although obviously some of that is just because no one has his size/athleticism in college.
I'm not a scout, I just play one on the internet.