Be super careful with those plastic clamshells.

Usually I'll build on the floor because there's less that can go wrong, but old and after years of concrete kneeling one of my knee just doesn't like pressure from kneeling on concrete anymore.

Popped the clamshell while standing with the < shape pointing away from me, it was being difficult so I gave it a little extra of a pull, and it turns out plastic clamshells that just don't want to give up easily are a trampolines for CPUs.

The CPU popped out, there was a countertop in front of me so I thought it'd be save, but it proceeded to skid across the polished stone countertop pin side up for probably about 6 feet, until it decided to Evel Knievel'd itself right off of the countertop right over the pet's fountain water feature, and then landed directly on the tile flooring. Stuck its landing pin side down and bent like 4-5 pins, but was lucky enough that the tip of a mechanical pencil fixed it.