I was at work, and I was looking at a hinged plastic (Pelican type) case with some custom padding in it.
We are putting custom padding in the case so that we can ship equipment to the customer. (No more details)
I was trying to figure out why it was harder to closer than the earlier ones did, so I was loading the equipment , and then trying to load it without the equipment.
Eventually, I determined that there was not something interfering with the equipment, which might crush some delicate electronics, but that the hinge was a bit different, but that’s not a problem, because it does not clamp the equipment any more tightly.
I was using a sheet of paper as a sort of a feeler gauge in order to figure out where the interference was, and a co-worker walked up behind me and said something to the effect of, “Everything OK with the case?”
I yelped loudly, and jumped about 6 inches in the air, which stunned the hell out of both of us, and then we both started laughing, as I said, “Too much coffee.”
I think I might have been hyper-focusing a bit,