Probably just a model. You know, those supermen with the props in the head look dang near real from any distance. And yes, to support the flapping motion of anything with any kind of weight there has to be some structure underneath. With birds, that don't weigh much, there is a really large breast bone. If a man was just as proportionally shapped, figure another foot and a half ridge down the middle of your chest.
But cheer up. If eventually we get largish space stations that we can visit (which would also be cool but way so dangerous) You COULD have a similar looking setup AND have it work, in micro gravity. There is video somewhere of an astronaut who uses a single strand of her hair to push herself away from the wall of the shuttle. With that little force needed it is easily conceivable that manpowered wing flappin flight would be no problem.
It also destroys the idea that Sandra Bullock had to let George Clooney go in Gravity. It's not like he was hanging off a cliff. The slightest of pulls would bring him back into her albeit at way less of a bone shattering speed that every other, life saving, totally unbelievable collision that they had did.
Ever notice that after getting slapped around by two space station hatches, clooney and a bunch of other stuff, she didn't have ONE bruise on her, well fantastic, body????