Two ideas, riffing off other folks:
Have you ever read Johnny Mnemonic? (If you've only seen the movie, scrub your brain clean and go track down the short story. Much better). There's a gang of folks who live on bridgeways between abandoned skyscrapers, hundreds of feet above the earth. A running battle across these crude bridges could be fun. The story's climax occurs in a great arena -- but I won't spoil it for you
A goth club (or any sort of trendy dance club) might be fun. Loud, pulsing music, which you actually play; flashing lights, if you have any -- and then the power is cut (you turn off the music and the lights), there's a moment of silence, in which the bad guys says some taunting words ("I can see youuuuuuuuu...."), and then people start screaming. If the bad guy chases them down an empty alley, and then you describe the recessed doorway with the bouncer outside it and the faint strains of dance music coming from inside, I guarandamntee you your players will take the bait.
Also, I don't know how you do it, but you have to use the egg-timer trick. That's awesome!
Daniel