I've had a past doing things that I shouldn't have done if I had had half a brain for safety. It all worked out with luck, and plenty of pro training assist and partners. Never had any great fear of heights climbing or other in service, We have had intermittent bad reception on the TV --OTA antenna above the ridge maybe 35' high. I installed it years ago. I go up to brush the two flues every year. This time standing on the ridge to repair and install a pre-amp on the antenna, I backed out. Too uneasy and shaky this time balancing on the ridge. Any of you ever had this kind of experience after doing something all your life ( working high, rock climbing, etc...), then all of a sudden you can't or don't feel comfortable doing it ?