...and bang my shoulder into my guard. I don't try to bull my way in. That would be an obvious charge. I just make contact, then step back quickly.
Then I shoot. Not only do the officials usually call a foul on the defensive man, but the contact helps me brace myself for a good shot.
Under the basket a good actor has a big advantage. The ball is loose, we're all moving and there is bound to be a lot of contact. Naturally, the officials are looking for fouls, so it's a good time for drawing them. And for my dramatics.
I hold position here, so I have an edge—if the referee suspects afoul, he is more likely to call it against the other man.
From the side you could tell that I'm falling on purpose here. But the official is usually under the basket, right in front of me. If I act pained enough he'll call a push.
In the situation above I do have position, so unless the ball takes a crazy bounce out of my reach I don't have to worry about overacting. Here, though, I am blocked out, and have a better chance to get the foul than I have to get the ball. Actually, I have nothing to lose in either case. I'm not breaking any rule, so the officials shouldn't call anything on me.
Cut off from the hall, with my opponent all set (left), I just happen to collide with one of his arms. I bounce off in agony (below), pretending he has elbowed me out of the way.