Who needs jetpacks when you have a water pack instead!?! Just what one needs when one is trapped in a sewer. Make your way through the smelly sewer with your turbo powered water pack and try to get out of it without being covered in muck.
As you must already know, sewers are filled with lots of dangerous things... for example, floating circular saws can be seen in any sewer under any city. Consequently, you will find such objects in the sewers of this game. Try to avoid them unless you have a fetish for being sliced in half.
In addition to requiring skill to fly your water pack around, you will need to activate some brain cells and solve the puzzles that face you. It's not all fun and games in the sewer, there is some thinking involved.
If you get out alive, I recommend taking a shower afterwards, goodness knows what you walked in during your adventure in the land of stink.