One of the things I love best about my job is the wide variety of situations, locations and elevations I find myself in. In this case, I am at the top of a 40' extension ladder. In the process of rewiring a vintage 1920s condo on 59th St, we installed a combination fan/light unit in the ceiling. We had to cut a hole in the ceiling to install the unit itself, and then we had to vent it to the outside by way of a cored hole in the exterior brick wall. Since this condo was on the third floor, the hole leading to outside was about 8" below the roof line, and thus about 45' off the ground. When I took these pics, I had just finished caulking all outside edges of the ventilation grate. I use high-quality, silicone caulk that is designed for sealing masonry holes, since I don't want it to ever leak! (And I sure don't want to set up this ladder again.) The view looking down shows the 3rd floor window sill, the 2nd floor window sill below that, and the small gray rectangle with the white dot is actually the top of a 6' step ladder leaning against the wall. You can see the other 6'step ladder that is open, and how the extension ladder is itself about 6' off the ground because it is actually sitting on a raised embankment.The IC/Metra tracks are just to the left, or west, of where I was working. If you want to be an electrician, you can't be afraid of heights!