Problem: How to flip on the trampoline
Get supervised training first.
Using a trampoline can be very dangerous, so it is best to train first in a safe environment. Training happens in lessons for competitive sports including gymnastics and diving.

Answer: There, a teacher or coach can help you learn how to use a trampoline properly. Improper use of a trampoline can lead to severe head and spinal injuries.

Problem: A man serves a tennis ball when playing tennis with a person in a tennis court. then

Answer: , the man serves again to a person behind the net, while a player stands next to him.

Problem: Several people are shown running inside onto a field with hundreds of people watching on the sidelines. the men
Answer: warm up and do several jumps and tricks while wandering around and huddling up.