First let us set the stage.
DM: You see the thief just down the street, your eyes make contact, and she turns and starts to move away from you, into the crowd of the market.
DM: What do you do?
Players 1, 2, & 3: We start after her!
The chase is on!
Now this is an event and has two outcomes 1) Players catch the thief or 2) they don’t. The DM already has the result planed (in most cases) but does not want the players to know that, just to have fun.
Some words to use: Chase- Pursue – Run after – Hunt – Hound – Trail – Tail – Shadow - Market – Bazaar – Crowd – Throng – Horde – Mob- Street – Lane – Boulevard – Avenue - Alley – Passage – Path – Side Street - Hot – Fast – Pounding – Beating – Throbbing – Number – Collide – Run Into – Ram – Crash – Run Over – Bump – Trip –
Now the Chase – section 1: Thief gets away is the result of this section.
DM: The thief sides into the bazaar moving quickly between the mass of shoppers and hawkers, glancing over her shoulder to see where you are; she ducks down a passage between two buildings (see she got away).
Players: We run after her, through the crowd, trying to close the distance!
DM: You are running? Rolls some dice.
DM: Player 1, 2 and 3 as you run into the marketplace a vendor pushing a cart of fruit moves into your path. What action do you take?
Player 1: I leap over the cart.
Player 2: I dodge to the right of the cart.
Player 3: I dodge to the left of the cart.
DM: Player 1 please roll DC 15 to avoid a push cart that has entered your path.
DM: Player 2 please roll DC 13 to avoid a shopper.
DM: Player 3 please roll a DC 13 to avoid a shopper.
DM Recap: In hot pursuit you run after the thief, entering the market, Player 1 trying to avoid a push cart that entered his path, leaps over the cart of fruit to the yells and curses of the vendor and shoppers, and falls behind a few paces. Trying to avoid the same cart, Player 2 collides into a shopper crashing to the cobblestones, knee throbbing, to see player 3 leading the way to the passage, weaving and dodging the throng, player 1 only a few paces behind.
This ends section 1 – the DM will ask the players what they do now. This is the start of section 2.
Movies are always a good start to look for ideas, they are storyboards and planned out, their is a market (fish/fruit are big), a hill, and some turns, you just add element to them.