Another form of collectible in GTA: Vice City alongside Hidden Packages and Rampages, there are a total of 36 Unique Stunt Jumps dotted around town -- and they make their return in Grand Theft Auto: The Trilogy.
Unlike the other collectibles, there's no trigger. Just take the ramps at high speed, and if you've hit them right, you'll complete the unique jump. As such, the faster vehicles in the game are most ideally suited to this task -- the PCJ-600 superbike is perfect.
You'll need all 36 jumps if you want to complete Vice City 100%. The rewards for completing jumps starts at $100 for the first, rising by a multiplier of how many jumps you've previously done. For example, the 20th jump will net you $2,000, while you'll get a $10,000 bonus for the 36th jump.