Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to stop a skateboard [title] Tail scrape only when going slowly. [step] Tail scraping is a very basic stopping method. When performing it, you can easily lose control of the board without meaning to.

Ending1: If you have never skied before, there is little you can do to stop it. You will just fall off the skateboard and die. Ending2: Simply stop the skateboard in a right or left lane of traffic. You will need the tail scrape to slow down dramatically. Ending3: Try tail scraping when skateboarding casually on a sidewalk or even ground. Use a more restrained method (like controlled slide stopping) in dangerous situations. Ending4: However, you should take the instant warning to heart. Beware: if you continue to lose control of the board without stopping, the board may break over time.

Answer format: ending1/ending2/ending3/ending4