I found an unexpected way to open my engine bonnet just two days ago:
At a stop light, get some middle-aged, worn-out business man next to you in an older Lexus who keeps eye-balling you from the corners of his eyes while creeping forward at the light, trying to get the jump on you. It also helps to have a nice looking BMW behind you. When the light turns green, stomp on the accelerator and blow the doors off the Lexus. When you hit the other side of the intersection you'll shift into 2nd gear.
That's when your engine lid will pop itself open
I can only hope everyone watching assumed it was an automatic wing ala Boxster to keep the car on the ground