Not alone. There's 1 massive log feature in Belmont (Philly) that I only remember doing once, either direction. It's a slight climb 1 direction, the descent direction has another log about 15-20ft prior. I've followed other riders, usually
@KenS, and try to visualize their line and chicken out before fully committing. Also seen many fail terribly, so that is what sticks in my head.
As for a trail, The Monster climb in Wiss, prior to the recent sanitation due to it being unsustainable. I probably cleaned 1 for every 10 attempts. Haven't been there since the completion of the project.