These range from powerful jumping smashes to delicate tumbling net returns. It is used as an official move in gymnastics, tumbling, and freerunning. Each level of gymnastics requires the athlete to perform a different number of tumbling passes. It is also famous for ground techniques such as rolling, tumbling, and other deceiving actions. There have been many catastrophic injuries from cheer, especially from tumbling and stunting. These are shapes cut from the rough rock before tumbling. This includes an illusion of inversion, in which one feels like they're tumbling backwards. SPL offers both tumbling and sliding windows. At this point the aircraft would be essentially tumbling, descending at a rate of . The Shard starts to crumble and Gabriel flies out of the tumbling helicopter. The Wall Came Tumbling Down"; the track was eventually released by Australian "Mamma Mia! The Wall Came Tumbling Down"; the song eventually was released by Australian "Mamma Mia! The commercials featured the children singing and tumbling around all day. At the end of the tumbling track there is a mat called the landing area. Other cut-wire shot applications include tumbling and vibratory finishing.