Some type of rare pickup that kicks the car high in the air, higher than typical rocket.
I was thinking of a 5 or 6 small rockets which could make a firework show
idea comes from torpedoes in rollcage
these rockets should be small, deploy quickly, fly fast and be easily avoidable (it also could be a cool thing to add for those players that supported for more cash, 6 colored small rockets with effects like fireworks in touch)
Put player high in the air, but not make the car lose speed or fly out left or right, just make it "jump" straight.
also it should be a pickup for wide open areas, because it would make a mayhem in the tunnel, and a shield should absorb more than 3 rockets at least