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Game Breaking
Exploiting this bug allows you to gain information without risk of death and your opponents have no idea that you are even in that area. This video really demonstrates how much of advantage this exploit can give.
How to exploit the bug:
- Find a wall or something that's a part of an alleyway
- Hold crouch while jumping
- Release crouch while in mid air
I personally didn't think that the jump bug was all that bad until I found this little clip