Most people feel nervous (紧张的) when they go skydiving (跳伞). These skydivers from Israel are not nervous at all. They just enjoy the freedom of falling from nearly 4,000 meters in the sky. They see the sky as their stage (舞台). They can do stunts (特技) while falling. Some of them make jokes with each other in the sky. Others join their hands together to form a circle. They seem to be quite fearless (无所畏惧的).