He'll hear them eventually. Jack has already taken a chunk out of Rapture's Daddy and Sister population, but in a city this large, that population is pretty huge.

The groans are angry and the drill is already whirring. There are shouts as well, and screaming. The girl's shrill voice shouting encouragement to her Daddy. Sounds like a few splicers have gotten brave -- and when Jack and Sinclair round the next corner, they'll be able to see the last one dying, slammed into a wall and shaking, then spinning, then dropping, smashed in half by the enormous drill.

Jack doesn't waste much time. He fishes in his pockets for a moment, counting EVE needles and health kits -- then jams a new canister into the chemical thrower and coats the Bouncer in a stream of electric gel.