Today’s lesson:
Lead bricks are really heavy.
That is all. Carry on.
(I had a student working on a project involving radiation over the summer, in a shared lab space. A colleague needs to use the space next term, so I was moving the summer project stuff across the hall to a more permanent home. I got a hand cart to move the lead bricks, stacked a whole bunch of them up, and then had to un-stack most of them in order to move the cart…)