Racing
Fly Car Stunt 5 gives each driver distinct auxiliary keys and one listed restart key, so clarify those actions before racing together.
Map the two driving roles
Fly Car Stunt 5 lists Player 1 movement on arrows with N for nitro and B to look back. Player 2 uses WASD, T for nitro, and C to look back. Read those roles together before the run. The nearby auxiliary keys are not interchangeable: a look back action changes the view, while nitro serves another purpose. Clear ownership prevents a surprising camera response from becoming an argument about the other player's driving.
Use a backward view deliberately
Before choosing to look back, know what you are trying to learn from the view. Perhaps you want to locate the other car if the current format makes that useful. Then return attention to the route ahead. The listing says the game includes aerial obstacles and timed levels, so the forward scene still contains immediate driving information. Do not hold an unfamiliar view simply because it offers a dramatic picture.
Set a shared restart convention
R is listed as level restart. Before using it in a shared session, agree when the pair wants to restart so one person does not interrupt the other's attempt unexpectedly. The exact behavior comes from the loaded mode, which should be checked first. This small agreement keeps the competition readable: each driver knows their movement and auxiliary controls, and both understand how an unfinished run will be ended or repeated.