what with the chance of cuts and slices and major hemorrhage and such. But friend had a broken window, so.
Get the old glass out, measure, get the new pane, start to install it and- it's too wide. By maybe 1/4". No, they didn't cut it wrong; I didn't notice that the top rail of the frame had a slot the glass fit into(I plead tired and dumbass), so it didn't need to be as wide as I thought. So back to Lowe's to trim that 1/4", back over, and it slides right in. I had some points left from my own cracked pane, did have to get some glazing compound, but it's all done.
Now if you'll excuse me, I think I'll eat something and fall over.