What vehicles offer more than the standard set of controls?

Another one I found:

• On a racing bike, press RT (360) or R1 (PS3) to lean forward and go/accelerate faster, but with an higher turning radius. Quite useful during triathlons.

Here are a few:

• Bulldozer: Left analog stick up/down -> raise/lower blade
• Submarine: A/X (360) / (PS3) -> sink/rise
• Convertibles: D-Pad right (when not moving) -> convert between roofed and open-air mode
• Plane from McKenzie Field Hangar: A (360) (PS3) -> Drop shipment/bombs
• JB700 (a James Bond-type special car):
  • X (360) (PS3) -> ejector seat (only works when the appropriate tooltip appears)
  • click left analog stick -> spikes