Is easy Ok this is What u do Go to RIGHT Side of the Fence (BOTH FENCE WILL WORK) in the Corner then make sure u have ur PRIMARY GUN out and that ur guy is Standing all way UP^^ then go on FREE LOOK and look UP then yust hold L and R and Push ur ANALOG-STICK- Slowly To the RIGHT so That he moves to the LEFT Ones hes Moving to the Left he would go in the Fence...HOPE THIS HELPED....

LET ME KNOW IF U GUYS NEED A VIDEO ILL MAKE ONE......
NOTE: IM NOT SURE IF ITS TRUE BUT SOME PEOPLE SAY THAT IF THERES MORE THAN 6 PEOPLE IN THE ROOM IT WONT WORK THIS WAY BUT IDONT THINK IS TRUE