While I did not event my horse at an event this past weekend, I went to support 3 friends who did. Let me preface this by saying I am a weeny eventer and certainly speak from very limited experience but i have jumped this particular course many times. For their HT, they included a jump that was on the Novice course last year. It was in a tree line draped in shadows. It looked like this: https://www.bing.com/images/search?q=types+of+cross+country+jumps+eventing&view=detailv2&&id=0A7AE6494314D9B987912CD879481E91675170CE&selectedIndex=51&ccid=QgVSLvTs&simid=608036644203597520&thid=OIP.M4205522ef4ec4bac946a3e8e0caec29eo0&ajaxhist=0. I did not measure the height at the top of the log but they had attached thin brush to the top vertically, most of which was a foot in height. While it was thin and wispy, it was sticking straight up in the shadows. There also was a drop on the landing side meaning the ground on the landing side was about 10" roughly lower than the take off side. I saw many refusals but the worst was a dislodged rider when she was not prepared for the jolt on the landing side. Her head hitting was heard by everyone. She was dazed and repeating statements as I stayed with her on the ground. (I was close, I’m a nurse, it seemed the thing to do). She was transported to the hospital with a concussion.
My point is as a low level weeny, we have not jumped brush. My friends had never either. It was thin and easily seen thru but it was in the shade, it was a higher jump and the landing presented problems for some. The jump without the brush is daunting enough. I did not see the point of this on a BN course. I now will be adding brush to my cc jumps.