Installing heavy networking/battery equipment in a rack by yourself without extra help. Cheap furniture that leads to repetitive stress injuries. Being woken up

Installing heavy networking/battery equipment in a rack by yourself without extra help. Cheap furniture that leads to repetitive stress injuries. Being woken up repeatedly at night which isn't good for your heart or health. Exposed wiring or poor grounding. Sharp edges on equipment coupled with trip hazards from poor wiring practices without the maintenance windows to fix it because "everything has to stay up." Replacing components on live hardware with extremely fast spinning fans. "Server rooms" that double as toxic (cleaning) chemical storage. Prolonged working around equipment with cooling systems that exceed the noise level for hearing damage. Stress-induced issues from on-call. Crawling around potential asbestos when running wiring for things such as wireless access points.