Physical Danger
The main danger in working as a CSI involves getting splattered with contaminated fluids. But wearing protective clothing, gloves, and face shields provides all the protection you'll need.
We mentioned the cold temperatures, which could be a little uncomfortable, but not frostbite-y. Saltwater or other solutions that spill or splash onto the floor could cause you to slip down or at least do an awkward, jerky dance trying to stay upright. Who knew you could be so entertaining?
CSIs work around heavy machinery so it's often noisy. The good news is you'll be up moving around most of the day and won't have to worry if your desk chair is comfortable.