The ACL stabilises the knee for cutting, twisting and jumping and pivoting exercise. The anterior cruciate ligament is in the middle of your knee joint. Any time you tear an ACL, you may often come to feel or hear a pop, come to feel the knee shift outside of position https://www.theorthopaedicandpainpractice.com/what-should-i-do-if-i-have-a-collateral-ligament-injury-of-the-knee/?_gl=1*xbbxlb*_up*MQ..&gclid=Cj0KCQjwkt6aBhDKARIsAAyeLJ2krYJSOuy5mZksrNqH-VDjQwW1ScD49yD8BUWysDG6u6bJPCSbXVUaAuCPEALw_wcB