Im the same way, I always crouch down. My co-worker and I were working on a commercial building last month, and we had to go on a flat roof and lean over near the edge ( no rails ) and pack some holes for fire-stop/fire penetration, I laid on my belly the whole time. I didn't give to flying fucks on how he was laughing or ripping in me, at least I know I was not falling off. Sounds like your pop was much like mine, mine would have talked me into going near the edge, then he would have scared me by grabbing my sides and yelling! No joke, It will come down to fist and ninja tactics if people come near me when I'm up high, all I ask is respect my personal space!