Let me tell you, it was kind of scary hanging off the wall with nothing securing you, especially when you have a bad knee. You will fall if you slip or lose your grip or just get tired.
But I had a lot of fun and my heart was racing. My forearms are SORE and it was hard work, especially since I finished an hour and a half physical therapy session right beforehand. OK, that might not have been the smartest move.
Have you ever been rock climbing or bouldering? Are you afraid of heights too? Wanna go climbing with me sometime?