Bridges always look close and high tension power lines even more so. I once motored up the St Joe river in Idaho in my C25 with my mother, brother and our family. It was the first time up the river for all of us but I knew that bigger sailboats had made the trip before me so my mast height would not be a problem. At one point there is a set of high tension lines crossing the river and my mom and wife were sure that we would hit them. I tried explaining that the two lowest wires are grounded "safety conductors" but they were not convinced.
As we were just passing the point where it looked like the mast would touch the first wire with all of us staring intently at the masthead, my brother reached over and squeezed my mom's knee with a loud "BZZZZZ!". Mum let out a screech and I thought we would need to pry her fingers of the overhead wires given the height she jumped.
Needless to say but me and my brother were in the doghouse with my wife for the rest of the day!