Stomach eye

Black hits White right in the stomach  

Black's first move, which seems like a punch in the stomach, ironically gives White an eye, but it also leaves White helpless after Black plays magari with . Black can capture the White stones with a live shape.

Deebster: I'm confused as to why/when this move would be used. The shape appears to be almost dead, and doesn't kill it. Furthermore, White could play tenuki and leave the group until the endgame, or as a small ko threat. Even if this were a semeai it wouldn't help.
Why not just play straight off?

Bulky five  

Niklaus: Because White whould then play to form the bulky five shape, which would kill black. The point is to make black live, not just to capture the white stones.