There are some BT maps that have boosters that push you vertically in order to reach some platform. With a few maps, the booster does not push me far enough to reach a platform. And I noticed that I'm not the only one, a few other people have problems reaching the platform (so they keep jumping on the same booster), while the majority have no problems. I have been playing BT for quite a while, so I know how to properly jump or use boosters. I could try every jump method (I've tried 500x on some booster) but the booster just doesn't push far enough.