Oh yeah, I am certainly aware of safety by now, I have fallen off bridges before, almost broke my feet one time, & almost TKO'ed myself by knocking my head against a arm rail, at 26 it has finally dawned on me that I am not superman. After I told my interviewer about my climbing adventures I told him that I realized the precarious balance between risk & reward, overconfidence & being too scared. Tree work is dangerous, thats why it pays so much, same goes for electricians. Don't worry, I won't conduct myself with a big head. I know above 55 feet the best falling advice is to land head first so you don't wind up a vegetable.