The meniscus disks in your knee are a type of this material that may tear if you twist wrong
The menisci 
are two crescent-shaped discs, each called a meniscus (men-NISS-kus), .... A 
partial or total tear may occur when a person quickly twists or rotates the upper 
leg... [DOC] [TLE] Meniscus Tear | PeaceHealth [PAR] The meniscus is a rubbery, C-shaped disc that cushions your knee.