About 4 years ago, I was building some telecom infrastructure in some bank. We had had the cable in, but I needed to put in a straight splice to connect the inside bit to the outside plant and actually light them up. The connection point was in...must've been a boiler room I think, in a corner about 12' up and I had to set up a ladder very awkwardly. Now, a straight splice is basically just this little brass thing that links the ends of two pieces of large caliber cable. You put one cable in one end and the other in the opposite, then you tighten two nuts in opposite directions with two wrenches. I had to reach out as far as I could to make contact with the thing and pushed with one wrench while pulling with the other. Pull wrench slipped on the brass and come straight for my face. The end result, I broke my nose by punching myself in the face.