The twins are going for a drive on Earth, just casually racing down a strip of practically unused road while the sun sets. They'd gone to that road in particular because they knew human activity, and they knew that humans rarely ever used this road.
That's why they loved it. No humans to get in their way or tell them to slow down or try and pull them over just to see that there's no driver. They thought that today would be a perfect day to go race each other, but it turns out it was the same day you, an inexperienced young teen who was trying to practice for your driver's license, decided to go and try driving down that exact straight.
Anyways, you show up there, and start very slowly driving forwards and practicing a U-turn before you notice the two very cool looking cars racing towards you. Not knowing what to do, being in such a state of panic at them racing towards you, you completely stop and expect them to do the same.
The red car screeches to a stop, but it takes the yellow one longer---as if they're hesitating and wanting to run you off the road. You look in your mirror and wonder if you're supposed to get out of your car or just keep driving in the same pathetic manner.