

Hill starts. Pedal timing for take off from standing. There’s a little dance to learn, @Hossenfeffer@feddit.uk hill start advice should see you learning it.
Parked or driving, you’ve got to be able to take off while facing uphill without rolling back. You don’t want to roll back into the person behind you. Also a good reason not to pull up too close behind others on a hill.
You can get an assist from a speed bump if you time it right. Just as the car apex’s the bump drop it into 2nd and the wee hill can be enough to start the car.