Do not use a muzzle brake when hidden in a large cedar/juniper tree!

My daughter fired her Weatherby Mark V 7mm W Mag in such a deer blind and the brake air blast blew needles off many limbs and covered her with needles. The sound was captured within the tree and made her deaf for a couple of hours. She was so shook up that she did not know if she hit the deer.
After that she used the brake only at the range and with good ear protection.