| 1 | Normal hammers slam into rock 30 to 60 times per second. | |
| 2 | Put the ball into the right area and Gibson's right foot is a hammer. | |
| 3 | In Shanghai, one of the fastest growing megacities in the world, it's easy to get lost in the relentless percussion of jack hammers and pile drivers, bulldozers and building cranes. |
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